纽约联储-信用卡银行（英）-2025.3_75页_3mb

Credit Card Banking Analysis Summary

Introduction and Motivation

• Background: Credit card interest rates average 23% (spread of 18% over Fed funds rate) in 2023, substantially higher than other loans or bonds (e.g., C&I loans spread 2.25%, high-yield bonds spread 4.21%).
• Research Questions:
  1. Why are credit card rates so high?
  2. What are the economics of credit card banking, including profitability and market power?

Key Findings

1. Profitability:

   • Credit card lending yields a high asset return of 6.8% (aggregate portfolio turnover), significantly higher than the banking sector's ROA (1.2%–1.5%).
   • Borrowers command 7–11% ROA, up to 10 percentage points higher than safe transactors (2.57%) due to risk premiums.
   • Alpha of credit card lending is 1.17%–1.44% relative to banking sector after risk-adjustment.

2. Pricing Drivers:

   • Default Risk Premium:
     • Credit card rates reflect a 5.3% default risk premium (equivalent to corporate high-yield bonds) due to undiversifiable losses correlated with economic downturns.
     • Risk-beta decreases with FICO score (e.g., high-FICO accounts have lower exposure).
   • Market Power:
     • High operating expenses (e.g., 4.76% of balances, 4–5% annually), particularly marketing (1–2% of assets), account for ~50% of default-adjusted APR spreads.
     • Credit card banks earn higher spreads (e.g., interest spread + 0.622% from higher operating expenses).

3. Non-Interest Income:

   • Interchange income (avg. 1.82% of purchase volume) outpaces rewards expenses (1.57%), contributing significantly to transactor returns (~4.6% of balances).
   • Rewards are largely covered by interchange income, but net interchange is a key profitability driver for transactors.

4. Comparison to Default Risk Premia in Corporate Bonds:

   • Credit card risk premia are similar to BBB/BB/bonds, except for CCC/C-rated bonds (where credit cards command ~3% higher risk premium).

Methodology and Data

• Data: Uses Federal Reserve's Y-14M supervisory dataset (330M accounts, ~90% US market), tracking cohorts by origination FICO score.
• Analysis: Decomposes profitability by borrowers (74% of accounts) vs. transactors (all pay higher purchase volumes and lower balances) and analyzes lifetime account returns.

Implications

• Credit card banking is a profitable and retail-intensive business where high interest rates reflect undiversifiable risk and market power, not solely default losses.

Conclusion

This study demonstrates that risk premia and market power are central to the economics of credit card pricing. Future work could explore competition effects, regulatory impacts, and emerging credit products.