Lära Understanding Credit Risk Metrics | Risk Assessment and Loan Analytics

Credit risk is a central concern for banks, as it reflects the likelihood that a borrower may fail to repay a loan. To manage this risk, banks rely on specific metrics that help them evaluate each borrower's financial position and the riskiness of each loan. Two of the most widely used credit risk metrics are the loan-to-value (LTV) ratio and the debt-to-income (DTI) ratio. These metrics allow you to quantify the risk associated with a loan by comparing the loan amount to the value of the collateral (LTV) or to the borrower's income (DTI).


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# Calculate LTV and DTI for a single loan using hardcoded values

# Loan details
loan_amount = 200000     # The amount of the loan in dollars
property_value = 250000  # The appraised value of the property in dollars
monthly_income = 6000    # Borrower's gross monthly income in dollars
monthly_debt_payments = 1800  # Total monthly debt payments (including new loan) in dollars

# Loan-to-Value ratio
ltv = loan_amount / property_value

# Debt-to-Income ratio
dti = monthly_debt_payments / monthly_income

print(f"LTV Ratio: {ltv:.2f}")
print(f"DTI Ratio: {dti:.2f}")

LTV and DTI are essential for making informed lending decisions. A higher LTV ratio means the loan amount is large compared to the property's value, increasing the risk for the bank if the borrower defaults. Similarly, a higher DTI ratio indicates that a larger portion of the borrower's income is committed to debt payments, which may signal a higher risk of repayment difficulties. By analyzing these metrics, banks can:

Set lending thresholds;
Adjust interest rates;
Require additional collateral to mitigate risk.


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import pandas as pd

# Sample data: each row is a customer with their loan and income details
data = {
    'loan_amount': [150000, 220000, 300000],
    'property_value': [200000, 275000, 350000],
    'monthly_income': [5000, 7000, 9000],
    'monthly_debt_payments': [1600, 2100, 3200]
}
df = pd.DataFrame(data)

# Calculate LTV and DTI for each customer
df['LTV'] = df['loan_amount'] / df['property_value']
df['DTI'] = df['monthly_debt_payments'] / df['monthly_income']

print(df[['loan_amount', 'property_value', 'monthly_income', 'monthly_debt_payments', 'LTV', 'DTI']])

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Avsnitt 2. Kapitel 1

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Suggested prompts:

Can you explain what values are considered high or low for LTV and DTI ratios?

How do banks use these ratios to make lending decisions?

Can you show how to interpret the output from the code samples?

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              12345678910111213141516
            
# Calculate LTV and DTI for a single loan using hardcoded values

# Loan details
loan_amount = 200000     # The amount of the loan in dollars
property_value = 250000  # The appraised value of the property in dollars
monthly_income = 6000    # Borrower's gross monthly income in dollars
monthly_debt_payments = 1800  # Total monthly debt payments (including new loan) in dollars

# Loan-to-Value ratio
ltv = loan_amount / property_value

# Debt-to-Income ratio
dti = monthly_debt_payments / monthly_income

print(f"LTV Ratio: {ltv:.2f}")
print(f"DTI Ratio: {dti:.2f}")

Set lending thresholds;
Adjust interest rates;
Require additional collateral to mitigate risk.


              12345678910111213141516
            
import pandas as pd

# Sample data: each row is a customer with their loan and income details
data = {
    'loan_amount': [150000, 220000, 300000],
    'property_value': [200000, 275000, 350000],
    'monthly_income': [5000, 7000, 9000],
    'monthly_debt_payments': [1600, 2100, 3200]
}
df = pd.DataFrame(data)

# Calculate LTV and DTI for each customer
df['LTV'] = df['loan_amount'] / df['property_value']
df['DTI'] = df['monthly_debt_payments'] / df['monthly_income']

print(df[['loan_amount', 'property_value', 'monthly_income', 'monthly_debt_payments', 'LTV', 'DTI']])

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 1

Understanding Credit Risk Metrics

1. What does the loan-to-value (LTV) ratio represent in banking?

2. Why is the debt-to-income (DTI) ratio important for credit risk assessment?

3. Which Python library is most useful for calculating these metrics for many customers at once?

Understanding Credit Risk Metrics

1. What does the loan-to-value (LTV) ratio represent in banking?

2. Why is the debt-to-income (DTI) ratio important for credit risk assessment?

3. Which Python library is most useful for calculating these metrics for many customers at once?