{"id":549,"date":"2019-07-22T02:56:00","date_gmt":"2019-07-22T02:56:00","guid":{"rendered":"https:\/\/analystprep.com\/study-notes\/?p=549"},"modified":"2026-03-31T11:13:41","modified_gmt":"2026-03-31T11:13:41","slug":"credit-scoring-and-retail-credit-risk-management","status":"publish","type":"post","link":"https:\/\/analystprep.com\/study-notes\/frm\/credit-scoring-and-retail-credit-risk-management\/","title":{"rendered":"Credit Scoring and Retail Credit Risk Management"},"content":{"rendered":"<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"ImageObject\",\n  \"@id\": \"https:\/\/analystprep.com\/study-notes\/images\/credit-scoring-img-1\",\n  \"contentUrl\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1.jpg\",\n  \"url\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1.jpg\",\n  \"caption\": \"Credit scoring model illustration\",\n  \"width\": 1024,\n  \"height\": 953,\n  \"copyrightNotice\": \"\u00a9 2024 AnalystPrep\",\n  \"acquireLicensePage\": \"https:\/\/analystprep.com\/license-info\",\n  \"creditText\": \"AnalystPrep Design Team\",\n  \"creator\": {\n    \"@type\": \"Organization\",\n    \"name\": \"AnalystPrep\"\n  },\n  \"isPartOf\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/analystprep.com\/study-notes\/frm\/credit-scoring-and-retail-credit-risk-management\/\"\n  }\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"ImageObject\",\n  \"@id\": \"https:\/\/analystprep.com\/study-notes\/images\/credit-scoring-img-2\",\n  \"contentUrl\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2.jpg\",\n  \"url\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2.jpg\",\n  \"caption\": \"Retail credit risk classification example\",\n  \"width\": 1024,\n  \"height\": 562,\n  \"copyrightNotice\": \"\u00a9 2024 AnalystPrep\",\n  \"acquireLicensePage\": \"https:\/\/analystprep.com\/license-info\",\n  \"creditText\": \"AnalystPrep Design Team\",\n  \"creator\": {\n    \"@type\": \"Organization\",\n    \"name\": \"AnalystPrep\"\n  },\n  \"isPartOf\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/analystprep.com\/study-notes\/frm\/credit-scoring-and-retail-credit-risk-management\/\"\n  }\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"ImageObject\",\n  \"@id\": \"https:\/\/analystprep.com\/study-notes\/images\/credit-scoring-img-3\",\n  \"contentUrl\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3-768x969.jpg\",\n  \"url\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3-768x969.jpg\",\n  \"caption\": \"Credit score distribution visualization\",\n  \"width\": 768,\n  \"height\": 969,\n  \"copyrightNotice\": \"\u00a9 2024 AnalystPrep\",\n  \"acquireLicensePage\": \"https:\/\/analystprep.com\/license-info\",\n  \"creditText\": \"AnalystPrep Design Team\",\n  \"creator\": {\n    \"@type\": \"Organization\",\n    \"name\": \"AnalystPrep\"\n  },\n  \"isPartOf\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/analystprep.com\/study-notes\/frm\/credit-scoring-and-retail-credit-risk-management\/\"\n  }\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"ImageObject\",\n  \"@id\": \"https:\/\/analystprep.com\/study-notes\/images\/credit-scoring-img-6\",\n  \"contentUrl\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6-768x533.jpg\",\n  \"url\": \"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6-768x533.jpg\",\n  \"caption\": \"Retail credit risk workflow overview\",\n  \"width\": 768,\n  \"height\": 533,\n  \"copyrightNotice\": \"\u00a9 2024 AnalystPrep\",\n  \"acquireLicensePage\": \"https:\/\/analystprep.com\/license-info\",\n  \"creditText\": \"AnalystPrep Design Team\",\n  \"creator\": {\n    \"@type\": \"Organization\",\n    \"name\": \"AnalystPrep\"\n  },\n  \"isPartOf\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/analystprep.com\/study-notes\/frm\/credit-scoring-and-retail-credit-risk-management\/\"\n  }\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"QAPage\",\n  \"mainEntity\": {\n    \"@type\": \"Question\",\n    \"name\": \"FICO scores most lenders use to determine credit risk most likely come from which source?\",\n    \"text\": \"FICO Scores, or the credit scores most lenders use to determine your credit risk, most likely come from which source?\",\n    \"answerCount\": 1,\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"FICO scores most likely come from a credit bureau. They are calculated by major credit bureaus such as Experian, Equifax, and TransUnion using credit information in an individual\u2019s credit file.\",\n      \"confidence\": 0.92\n    }\n  }\n}\n<\/script><\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/wRab3EFKdx8\" width=\"611\" height=\"343\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p><strong>After completing this reading<\/strong>,<strong> you should be able to<\/strong>:<\/p>\n<ul>\n<li>Analyze the credit risks and other risks generated by retail banking.<\/li>\n<li>Explain the differences between retail credit risk and corporate credit risk.<\/li>\n<li>Discuss the \u201cdark side\u201d of retail credit risk and the measures that attempt to address the problem.<\/li>\n<li>Define and describe credit risk scoring model types, key variables, and applications.<\/li>\n<li>Discuss the key variables in a mortgage credit assessment and describe the use of cutoff scores, default rates, and loss rates in a credit scoring model.<\/li>\n<li>Discuss the measurement and monitoring of a scorecard performance including the use of cumulative accuracy profile (CAP) and the accuracy ratio (AR) techniques.<\/li>\n<li>Describe the customer relationship cycle and discuss the trade-off between creditworthiness and profitability.<\/li>\n<li>Discuss the benefits of risk-based pricing of financial services.<\/li>\n<\/ul>\n<h2>What is Retail Banking?<\/h2>\n<p>According to the Basel Committee, retail banking is characterized by the following:<\/p>\n<ul>\n<li>A large number of small, low-value loans.<\/li>\n<li>Focus on either consumer or business financing.<\/li>\n<li>Incremental risk of any single exposure is small.<\/li>\n<\/ul>\n<p>Retail banks receive deposits from customers and then create a pool of funds that are lent to consumers and small businesses. Loans take various forms, including:<\/p>\n<ul>\n<li>Installment loans (e.g., personal finance, educational loans, auto loans, leasing).<\/li>\n<li>Residential mortgages.<\/li>\n<li>Revolving credit lines (e.g. overdrafts and home equity lines).<\/li>\n<li>Credit cards.<\/li>\n<li>Small business loans with a total exposure of not more than 1 million euros.<\/li>\n<\/ul>\n<h3>Risks Generated by Retail Banking<\/h3>\n<p>The main risk associated with retail banking is credit risk. This is the risk that a borrower will default on debt.<\/p>\n<p>Other than credit risk, retail banking has the following risks:<\/p>\n<ul>\n<li><strong>Interest rate risk<\/strong> occurs when a bank offers specific rates to both borrowers and depositors.<\/li>\n<li><strong>Asset valuation risk<\/strong> is the risk that a bank will not come up with an accurate value for a particular asset, liability, class, or collateral. This risk is particularly compounded by prepayment risk, which is the risk that borrowed funds will be returned earlier than scheduled. Customers keen to take advantage of more favorable borrowing terms elsewhere always opt for prepayment of their loans.<\/li>\n<li><strong>Business risks<\/strong> such as fluctuations in mortgage business volume when interest rates go up or down, strategic risks (such as the adoption of new business products such as internet banking), and decisions about mergers or acquisitions.<\/li>\n<li><strong>Operational risks<\/strong> such as fraud perpetrated either by customers or employees.<\/li>\n<li><strong>Reputation risks<\/strong> with respect to delivering on promises made to customers and regulators.<\/li>\n<\/ul>\n<h2>Retail Credit Risk vs. Corporate Credit Risk<\/h2>\n<p>Retail banking is exposed to credit risk that has very different dynamics compared to the credit risk of commercial and investment banking businesses.<\/p>\n<p>To begin with, retail credit exposure comes in bite-sized pieces. The implication of this is that a single customer&#8217;s default does not trigger a financial loss big enough to threaten a bank. Commercial and investment banking exposures can be large and expensive. Consequently, a single corporate borrower&#8217;s default can subject the business to significant financial turmoil.<\/p>\n<p>Besides, retail customers tend to be financially independent with little economic ties. Indeed, the financial fortunes of a retail customer can be very different from those of other customers. In contrast, corporate and commercial business contains concentrated exposures, with corporations having significant economic\/industrial\/geographical ties.<\/p>\n<p>For this reason, retail banks are able to come up with more reliable estimates of the percentage loss of a portfolio whose default they &#8220;anticipate.&#8221; Note that default events trigger loss. Being in a position to reliably estimate the expected loss has two implications:<\/p>\n<ul>\n<li>A bank knows its cost of doing business and is, therefore, able to project earnings and develop future strategies without worrying too much about solvency.<\/li>\n<li>The expected loss can be transformed into the price charged for a product or service.<\/li>\n<\/ul>\n<p>By contrast, the expected loss from corporate lending is much more difficult to model and is often a highly fluctuating amount.<\/p>\n<p>Retail portfolios also tend to have easily noticeable warning signals that can be used to predict a rise in defaults. For example, a customer embroiled in some kind of financial strain might fail to make a minimum payment on his credit card. Once such a warning signal is received, a bank is able to take preemptive action to reduce credit risk. In such instances, a bank can:<\/p>\n<ul>\n<li>Introduce changes to rules governing money disbursal to clients. For example, the bank may reduce a credit card limit or even withdraw an overdraft facility.<\/li>\n<li>Alter customer acceptance rules to keep away risky business.<\/li>\n<li>Increase the interest rate to take the higher likelihood of default into account.<\/li>\n<\/ul>\n<p>It is much more difficult to notice warning signs in <strong>commercial credit portfolios<\/strong>. By the time a problem becomes obvious, it is often too late to do much about it.<\/p>\n<h2>The Dark Side of Retail Credit Risk<\/h2>\n<p>Since retail credit risk is relatively predictable, retail banks are required to set aside a relatively small amount of risk capital compared to their commercial counterparts. However, retail credit risk has a dark side.<\/p>\n<p>An unforeseen systematic event may influence the behavior of credits in a bank\u2019s retail portfolio, triggering large-scale losses that exceed the expected levels. The dark side of retail credit risk can be traced down to four causes:<\/p>\n<ol style=\"list-style-type: lower-roman;\">\n<li>In retail banking, innovation, and technological advances facilitate the continuous development of new credit products. However, with new products come modeling and pricing challenges. This is attributed to the possible deficit of historical data that can be used to make reliable risk assessments.<\/li>\n<li>No single retail credit product is immune to unexpected fluctuations. A sharp change in the economic environment may lead to a situation where all risk factors get worse at the same time. In the mortgage industry, for example, a deep recession combined with high interest rates can trigger an increase in the number of defaults at the same time, house prices fall very sharply. Such a scenario would be financially devastating for banks because the loss given default would increase significantly.<\/li>\n<li>Retail banking is especially prone to operational flaws that may result in a situation where products are offered to higher-risk individuals. This happens because the decision of whether or not to grant a product is usually an automated process that may not capture certain customer-specific characteristics.<\/li>\n<li>The social and legal environments, which are constantly changing, may inadvertently encourage defaults. A bank may experience legal challenges in its attempt to recover at least part of its funds following an event of default.<\/li>\n<\/ol>\n<h3>Measures That Attempt to Address the Dark Side of Retail Credit Risk<\/h3>\n<p>Over the years, a series of measures have been taken in an attempt to reduce retail credit risk and protect banks from crumbling as a result of a large number of defaults. One of these is the Dodd-Frank Act.<\/p>\n<p>The Dodd-Frank Act was a massive piece of U.S. legislation passed in 2010. It was tailored to restore stability in the financial system and avert a repeat of the events that led to the 2007\/09 financial crisis. The act targeted banks, mortgage lenders, and credit rating agencies. It sets out several provisions. In particular, it gives the Financial Stability Oversight Council:<\/p>\n<ul>\n<li>The authority to monitor the financial stability of financial institutions whose failure could have a serious negative impact on the economy.<\/li>\n<li>Powers to increase reserve requirements for banks.<\/li>\n<li>Powers to break up banks that are considered large enough to pose systemic risk.<\/li>\n<\/ul>\n<p>The Dodd-Frank act led to the establishment of the Consumer Financial Protection Bureau (CFPB) to further help deal with the dark side of retail credit risk. The Consumer Financial Protection Act (CFPA) (established under CFPB) requires banks to evaluate qualified mortgages and the <strong>ability to pay<\/strong>. If a mortgage is labeled a <strong>&#8220;qualified mortgage&#8221;<\/strong> (QM), then a creditor can assume that the borrower has met this requirement.<\/p>\n<p>A qualified mortgage must have several features:<\/p>\n<ul>\n<li>The debt-to-income (DTI) ratio must not exceed 43%. A low DTI ratio indicates sufficient income, relative to debt servicing.<\/li>\n<li>It must not have excess upfront points or fees.<\/li>\n<li>It must not have features considered \u201ctoxic\u201d. Such features include terms longer than 30 years, negative amortization, balloon payments, or interest-only features.<\/li>\n<\/ul>\n<p>Loan originators making ability-to-pay determinations must consider eight underwriting factors:<\/p>\n<ol type=\"I\">\n<li>Current or reasonably expected income or assets.<\/li>\n<li>Current employment status.<\/li>\n<li>The monthly payment on the covered transaction.<\/li>\n<li>The monthly payment on any simultaneous loan.<\/li>\n<li>The monthly payment for mortgage-related obligations.<\/li>\n<li>Current debt obligations, alimony, and child support.<\/li>\n<li>The monthly debt-to-income ratio or residual income.<\/li>\n<li>Credit history.<\/li>\n<\/ol>\n<h2>Credit Risk Scoring Models<\/h2>\n<p>A credit scoring model uses statistical techniques to convert information about a credit applicant or an existing account holder into numbers. The numbers are then combined (usually added) to form a score. The higher the score, the higher the probability of repayment by the borrower and the lower the overall risk.<\/p>\n<p>Credit scoring is important in several ways:<\/p>\n<ul>\n<li>It helps banks to avoid risky customers and assess whether a business product is likely to be profitable. This is done by calculating the profit margin that remains once operating and default costs have been subtracted from gross revenues.<\/li>\n<li>It automates customer evaluation, a task that would otherwise need to be carried out by a large number of qualified, experienced credit officers.<\/li>\n<\/ul>\n<p>The distinction of credit scoring models is their ability to consistently weight and treat the information items they extract from applications and\/or credit bureau reports. In credit industry parlance, the term \u201citem\u201d refers to a \u201ccharacteristic,\u201d such as the questions on a credit application or the entries in a credit bureau report. Each characteristic attracts an entry or rather an answer given by an applicant. This answer is called an attribute. The following are a few examples:<\/p>\n<p>$$ \\begin{array}{c|c} \\textbf{Characteristic} &amp; \\textbf{Attribute} \\\\ \\hline \\text{Number of years at residence} &amp; \\text{3 years} \\\\ \\hline \\text{Annual income} &amp; $ \\text{30,000} \\\\ \\hline \\text{Years in previous job} &amp; \\text{2 years} \\\\ \\hline \\text{Purpose of loan} &amp; \\text{Home purchase} \\\\ \\end{array} $$<\/p>\n<p>Some of the statistical techniques used to weight the information in a credit report include mathematical programming, linear or logistic regression, or classification trees, and genetic algorithms.<\/p>\n<h3>Types of Credit Scoring Models<\/h3>\n<h4>Credit Bureau Models<\/h4>\n<p>Credit bureau scores are developed by credit bureaus. They are often known as FICO scores because the method adopted to produce them was crafted by the Fair Isaac Corporation. They take 5 different types of borrower information into account: payment history, types of credit used, length of credit history, new credit accounts, and current level of indebtedness.<\/p>\n<p>FICO (formerly the Fair Isaac Corporation) is a well-established analytics software company that provides credit data to both consumers and businesses. FICO scores range between 300 and 850, with scores above 650 considered \u201cgood\u201d. A score of 579 or less often makes it difficult for a borrower to obtain financing. In the United States and Canada, bureau scores are maintained and supplied by companies such as Equifax and TransUnion.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"953\" class=\"aligncenter size-full wp-image-9772\" style=\"max-width: 100%;\" src=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1.jpg\" alt=\"Credit Score\" srcset=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1.jpg 1024w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1-300x279.jpg 300w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1-768x715.jpg 768w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_1-400x372.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/>Credit bureau models are preferred by most banks because they are cost-friendly, easy to install, and provide a broad overview of an applicant\u2019s creditworthiness.<\/p>\n<h4>Pooled Models<\/h4>\n<p>As the name suggests, pooled models gather credit data from a wide range of lenders with similar credit portfolios. For example, credit card data from multiple banks may be combined to develop a revolving credit pooled model.<\/p>\n<p>Compared to credit bureau models, pooled models are more costly to develop and implement. However, they come with more flexibility and can be \u201ctrained\u201d on a specific market segment, such as revolving credit. It is, nevertheless, imperative to note that they are not as costly or flexible as custom models.<\/p>\n<h4>Custom Model<\/h4>\n<p>A custom model is developed by a lender using data gathered from its own credit application pool. They are tailored to screen for a specific application profile for a specific lender\u2019s product. In fact, some banks have carved a reputation for developing models in certain credit segments. A robust custom model can give a bank an edge when selecting customers.<\/p>\n<p>In general, 5 different credit files exist for every individual with a credit history:<\/p>\n<ul>\n<li><strong>Identifying information<\/strong>: This is personal information not used in credit scoring models. This includes gender, race, and religion.<\/li>\n<li><strong>Legal<\/strong> (public) records on bankruptcies, tax liens, and judgments.<\/li>\n<li><strong>Account and trade line information<\/strong> gathered from receivables information sent to credit bureaus by grantors.<\/li>\n<li><strong>Inquiries<\/strong>: Every time a credit inquiry is made, the inquiry is filed and anyone viewing the file in the future will be able to see how many times the file has been accessed.<\/li>\n<li><strong>Payment information<\/strong> reported by debt collection agencies or by entities that grant credit.<\/li>\n<\/ul>\n<h2>Key Variables in a Mortgage Credit Assessment<\/h2>\n<p>During the credit evaluation process, credit originators scrutinize several key variables. These are:<\/p>\n<ul>\n<li><strong>FICO<\/strong>: A score that provides a quick way of assessing an applicant\u2019s creditworthiness.<\/li>\n<li><strong>DTI<\/strong>: Debt-to-income ratio is used to qualify mortgage payments and other monthly debt payments versus income.\n<p>$$ \\text{DTI}=\\cfrac { \\text{monthly debt payments} }{ \\text{monthly income} } $$<\/p>\n<p>By looking at the DTI, a lender is able to tell whether the credit applicant has room for another loan.<\/p>\n<\/li>\n<li><strong>LTV<\/strong>: This is the ratio of a loan to the value of an asset purchased \u2014i.e., the loan-to-value ratio. A higher ratio generally indicates a higher level of credit risk.<\/li>\n<li><strong>Payment type (Pmt)<\/strong>: Indicates the type of mortgage, e.g., adjustable rate, fixed, etc.<\/li>\n<\/ul>\n<p>Mortgage products also differ according to the type of information a lender demands before approval:<\/p>\n<ul>\n<li><strong>Full doc<\/strong>: The loan requires proof of income and assets. Debt-to-income ratios must be calculated.<\/li>\n<li><strong>Stated income<\/strong>: The mortgage lender verifies employment but not income.<\/li>\n<li><strong>No income\/No asset<\/strong>: The mortgage allows the applicant to state their income and assets that can be used as security on the loan application document. Although the source of the income is verified, the lender makes no attempt to verify whether this information is true (and whether such assets indeed exist).<\/li>\n<li><strong>No ratio<\/strong>: The DTI is not calculated because income is not listed on the application. Only employment information is requested.<\/li>\n<li><strong>No doc<\/strong>: The applicant does not have to provide income or asset information documentation. Application forms may have fields for such information, but the fields are left blank.<\/li>\n<\/ul>\n<h2>The Use of Cutoff Scores, Default Rates, and Loss Rates in a Credit Scoring Model<\/h2>\n<p>Credit-scoring models developed in the early days didn\u2019t consider the actual probability of default assigned to a credit applicant. Instead, the models ranked applicants in relation to their<strong><i> relative risk<\/i><\/strong><i>.<\/i> The goal among lenders was not to come up with an <strong>absolute measure<\/strong> of default probability. Rather, they aimed at choosing an appropriate cutoff score. All applicants with a credit score, at least as much as the cutoff score, were accepted, based on subjective criteria.<\/p>\n<p>The figure below illustrates the distribution of \u201cgood\u201d and \u201cbad\u201d accounts by credit score.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"562\" class=\"aligncenter size-full wp-image-9773\" style=\"max-width: 100%;\" src=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2.jpg\" alt=\"Distribution of Good and Bad Accounts Based on a Cutoff Score\" srcset=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2.jpg 1024w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2-300x165.jpg 300w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2-768x422.jpg 768w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_2-400x220.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/>In this case, the cutoff score has been set at 680, implying that only applications scoring that value, or higher, would be accepted. The firm would avoid lending money to the body of bad customers to the left of the vertical line. However, such a decision would lock out the smaller body of good accounts to the left of the line (false bads). If the cutoff were to be moved further to the right, the lender would be successful in cutting off an even higher fraction of bad accounts, but the fraction of false bads would also go up. In such a scenario, the lender may succeed in reducing the default rate but struggle to increase the business volume over time, unless the scoring system is relaxed a bit.<\/p>\n<p>Once a lender has established the cutoff score, it can comfortably determine, based on its actual experience, the loss rate and profitability of the retail product. In order to optimize the profit margin, product by product over time, the bank can adjust the cutoff score.<\/p>\n<p>Thanks to a relatively bigger customer base, retail banking has an edge over wholesale banking when it comes to the accumulation of product data to assess the performance of a scoring model. Most lenders tend to update their statistics on loss rates and profitability on a quarterly basis.<\/p>\n<p>The Basel Accord mandates banks to cluster their portfolios into subgroups that share similar loss attributes and calibrate score bands that are indicative of different levels of risk. The PD and LGD must be estimated for each subgroup. The implied PD is a function of the historical loss rate and the LGD. For example, a PD of 5% would be attached to a portfolio that has a loss rate of 3% and a recovery rate of 40% (PD = 3%\/60%).<\/p>\n<h2>Measurement and Monitoring the Performance of a Scorecard<\/h2>\n<p>Lenders use a credit scoring model to help them predict \u2013 with reasonable accuracy \u2013 which applications will be good or bad in the future. To achieve this, a scorecard must be able to differentiate between \u201cgood\u201d and \u201cbad\u201d by assigning high scores to good credits and low scores to poor ones. A good model minimizes the overlapping area of the distribution of the good and bad credits, as we saw above in <em>The Distribution of Good and Bad Accounts Based on a Cutoff Score<\/em>.<\/p>\n<p>For this reason, it is important to come up with tools that can be used to measure the performance of a scorecard. The most popular tools today are the cumulative accuracy profile (CAP) and the accuracy ratio.<\/p>\n<p>The figure below illustrates how the CAP works.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1293\" class=\"aligncenter size-full wp-image-9774\" style=\"max-width: 100%;\" src=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3.jpg\" alt=\"Cumulative Accuracy Profile (CAP) and Accuracy Ratio (AR)\" srcset=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3.jpg 1024w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3-238x300.jpg 238w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3-768x969.jpg 768w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3-811x1024.jpg 811w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_3-400x505.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/>The horizontal axis shows the percentiles of the predicted default scores in the data set. The vertical axis, on the other hand, shows the actual defaults in percentage terms obtained from the bank\u2019s records.<\/p>\n<p>For illustration purposes, let\u2019s assume that according to the bank\u2019s scoring model, 20 percent of the accounts will default in the next 12 months. If the model were perfect, the <strong>actual<\/strong> number of defaults recorded over that time period would correspond to the second decile of the score distribution \u2013 the perfect model line in the figure.<\/p>\n<p>On the other hand, the model can also be totally uninformative such that it cannot differentiate between good and bad credit. In that case, we would expect to capture a proportional fraction (e.g. 20% of the defaulters with about 20% of the observations or 10% of the defaulters with about 10% of the observations). This would yield a CAP curve along the 45-degree line, i.e., the \u201cRandom Model\u201d curve.<\/p>\n<p>The observed cumulative default line represents the actual defaults observed by the bank. A lender would aim to develop a model whose results are relatively close to the perfect model line.<\/p>\n<p>The area under the perfect model is denoted \\({\\text{A}}_{\\text{P}}\\), while the area under the actual (current) rating model is denoted \\({\\text{A}}_{\\text{R}}\\).<\/p>\n<p>The accuracy ratio, \\(\\text{AR} = \\frac {\\text{AR}}{\\text{AP}}\\). It is the ratio of the performance improvement of the current model over the random model to the performance improvement of the perfect model over the random model. <strong>The closer this ratio is to 1<\/strong>,<strong> the more accurate the model is<\/strong>.<\/p>\n<p>$$ \\text{AR}=\\cfrac { \\text{area between current model and diagonal} }{ \\text{area between perfect model and diagonal} } =\\cfrac { { \\text{A} }_{ \\text{R} } }{ { \\text{A} }_{ \\text{P} } } $$<\/p>\n<p>A scoring model should be updated regularly to reflect changes in the underlying population of credits as well as changes in the products being offered.<\/p>\n<h2>The Trade-off between Creditworthiness and Profitability<\/h2>\n<p>In the credit market, it is all about the complex interplay between risk and reward. On the one hand, banks can concentrate more on default probability and offer their products to highly creditworthy individuals. The problem with such a policy is that the bank limits its profitability. For example, credit cards issued to creditworthy customers may end up not being used at all. Such customers may also be able to extract favorable (less profitable) credit terms from the lender.<\/p>\n<p>On the other hand, a profit-driven bank will target individuals with a higher probability of default risk because these individuals are prepared for a higher rate of interest and, therefore, the bank will make more money from every contract. What\u2019s more, a person with an unstable income stream is more likely to use a credit card, for example. But with such a policy comes the risk that the customer may be unable to pay loaned funds, leading to losses for the bank. For this reason, lending institutions have to find a way to balance profitability and risk.<\/p>\n<p>Leading banks are continually exploring ways to make profits and at the same time keep an eye on risk. Notably, banks have been moving away from default-oriented credit scoring. Instead, they have been warming up to:<\/p>\n<ol style=\"list-style-type: lower-roman;\">\n<li><strong>Product profit scoring<\/strong>: Where the profit a bank stands to make from a customer is dependent upon product specificity, e.g., a credit card, a mortgage loan, etc.<\/li>\n<li><strong>Customer profit scoring<\/strong>: Where the total profitability of the customer to the lender is evaluated.<\/li>\n<\/ol>\n<p>By extensively analyzing customer data, lenders can select credit limits, interest margins, and other product features that maximize profitability. They can also leave room for adjustments with respect to risk, operating, and marketing parameters once they have established a (business) relationship with the customer.<\/p>\n<p>Beyond credit bureau scores, a bank can evaluate several other scorecards to make a decision regarding a new application, or an existing one, and also assess profitability:<\/p>\n<ul>\n<li><strong>Application scores<\/strong>: Are based on the information given in the credit application form. They support the initial decision as to whether to accept a new applicant for credit or not.<\/li>\n<li><strong>Attrition scores<\/strong>: Assigns a probability to whether existing customers will close their accounts, reduce their balance on existing credits, or turn down an offer to renew a credit product such as a mortgage.<\/li>\n<li><strong>Revenue scores<\/strong>: Are used to evaluate and predict the profitability of existing customers, for instance, when offering an additional product.<\/li>\n<li><strong>Behavior scores<\/strong>: Are based on observed past behavior of existing credit account holders, e.g., usage of credit and delinquency history.<\/li>\n<li><strong>Tax authority scores<\/strong>: Predict situations where potential audits may be needed for revenue collection.<\/li>\n<li><strong>Response scores<\/strong>: Assign a probability of whether a customer will respond to an offer or not.<\/li>\n<li><strong>Insurance scores<\/strong>: Predict the likelihood of claims from insured parties.<\/li>\n<\/ul>\n<h2>The Customer Relationship Cycle<\/h2>\n<p>Most banks have developed a customer relationship cycle that spells out the steps to take \u2013 from wooing customers, screening them for approval, and continually managing accounts while at the same time growing the business.<\/p>\n<p>The customer relationship cycle can be split into three stages: marketing initiatives, the screening process, and the account management stage.<\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"710\" class=\"aligncenter size-full wp-image-9775\" style=\"max-width: 100%;\" src=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6.jpg\" alt=\"The Customer Relationship Cycle\" srcset=\"https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6.jpg 1024w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6-300x208.jpg 300w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6-768x533.jpg 768w, https:\/\/analystprep.com\/study-notes\/wp-content\/uploads\/2019\/07\/img_6-400x277.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/>Marketing initiatives<\/strong> have much to do with tactics a bank uses to either sell a product to new customers or expand the consumption range for existing customers. A bank continually explores ways to offer tailor-made products that take the specific needs of a customer into account. For tailor-made products to do well, a bank must invest in detailed marketing studies that analyze the most likely response of various client segments.<\/p>\n<p>The <strong>screening process<\/strong> requires banks to decide which applications to accept or reject based on credit scores. A bank has to decide whether to offer the initial credit line that takes a customer\u2019s level of risk into account or not.<\/p>\n<p>In the <strong>account management<\/strong> stage, a bank makes a series of decisions based on observed past behavior and activity. The bank can modify a credit line, renew it, or terminate services. The bank also explores whether cross-selling is possible. For example, the bank may extend a mortgage to a client who\u2019s been operating a checking\/savings account for a while.<\/p>\n<h2>Benefits of Risk-based Pricing of Financial Services<\/h2>\n<p>Most banks have realized that a \u201c<strong>one price fits all<\/strong>\u201d policy has no place in the modern competitive credit market because it leads to <strong>adverse selection<\/strong>. This refers to a situation where a bank inadvertently attracts bad risks to whom a product is attractive while keeping good risks away.<\/p>\n<p>As such, banks have resorted to risk-based pricing (RBP) where different customers are charged different prices based on their associated risks. RBP is still a budding practice in the financial retail sector. However, it has been practiced more frequently in some business lines, such as credit cards, home mortgages, and auto loan lines. Risk-based pricing has several benefits:<\/p>\n<ul>\n<li>It helps avoid adverse selection.<\/li>\n<li>It can help the bank to venture into business segments that are otherwise, underserved.<\/li>\n<li>Customers who practice low credit risk behaviors and generally honor their obligations can be rewarded with more favorable terms.<\/li>\n<\/ul>\n<blockquote>\n<h2>Practice Question<\/h2>\n<p>FICO Scores, or the credit scores most lenders use to determine your credit risk, most likely come from:<\/p>\n<p>A. A wide range of lenders having credit portfolios that are related.<\/p>\n<p>B. Outside vendors.<\/p>\n<p>C. A credit bureau.<\/p>\n<p>D. A custom model.<\/p>\n<p>The correct answer is <strong>C<\/strong>.<\/p>\n<p>FICO Scores are the credit scores most lenders use to determine your credit risk. You have FICO Scores from each of the three credit bureaus\u2014Experian, Equifax, and TransUnion. Each score is based on information about you that a credit bureau keeps in their file. They are generic scores with low costs and are easy to install.<\/p>\n<p><b>A is incorrect. <\/b>While lenders do use FICO Scores to assess credit risk, the scores themselves are not a result of credit portfolios from a range of lenders. FICO Scores are calculated by credit bureaus based on the credit information they collect, not directly by lenders.<\/p>\n<p><b>B is incorrect. <\/b>Although FICO Scores may be utilized by outside vendors in various services, the scores are not originally created by these vendors. FICO Scores are calculated by the major credit bureaus using proprietary models developed by Fair Isaac Corporation.<\/p>\n<p><b>D is incorrect. <\/b>FICO Scores are not custom models tailored by individual lenders. They are standardized and widely used credit scores created by Fair Isaac Corporation (hence the name FICO) and provided by credit bureaus. Custom models may be developed by lenders for their own specific needs, but these are separate from FICO Scores.<\/p>\n<\/blockquote>\n\n            <div \n                class=\"elfsight-widget-pricing-table elfsight-widget\" \n                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Explain the differences between retail credit risk and corporate credit risk. Discuss the \u201cdark side\u201d of retail credit risk and&#8230;<\/p>\n","protected":false},"author":3,"featured_media":1534,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11,6,9],"tags":[],"class_list":["post-549","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-credit-risk-measurement-and-management","category-frm","category-part-2","blog-post","animate"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Credit Scoring and Retail Credit Risk Management<\/title>\n<meta name=\"description\" content=\"Learn how credit scoring models assess retail credit risk, including key factors banks use to evaluate borrowers and manage lending decisions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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