While lower rates seem beneficial for leveraged companies, the context is critical. The Federal Reserve typically cuts rates in response to a weakening economy. This economic downturn usually harms issuer fundamentals more than the lower borrowing costs can help, making rate-cutting cycles a net negative for high-yield credit.

Contrary to the common perception of users paying off balances monthly ("transactors"), the majority—about 60%—are "revolvers" who carry debt. This group is the primary source of profit for card issuers, as they are subject to interest rates now averaging a staggering 23%.

The same banks issuing high-interest credit cards offer substantially cheaper personal lines of credit to customers with identical FICO scores. Despite being a logical tool for consolidating expensive card debt, these products receive almost no marketing, making them largely invisible to consumers.

While many assume high credit card rates cover default risk, actual charge-offs on revolving balances average only 5.75%. This is a significant cost but accounts for less than a third of the typical interest rate spread, indicating that other factors like risk premiums and operating costs are major drivers.

A surprisingly large portion of high credit card APRs covers operating expenses, particularly marketing. Issuers like Amex and Capital One spend billions annually on customer acquisition. This spending is passed directly to consumers, as higher marketing budgets correlate with higher chargeable rates.

A proposed 10% cap on credit card interest rates, while intended to improve affordability, would likely have the opposite effect. This policy would probably force lenders to tighten credit standards to offset lower profitability, ultimately restricting credit access for the very subprime consumers and balance-carriers it aims to help.

A government-imposed cap on credit card interest rates would make the business model unviable for most customers due to risk-reward dynamics. Banks would be forced to deny cards to anyone but the lowest-risk individuals, effectively canceling access to credit for the majority of the population.

Consumers are largely insensitive to the interest rates they are charged, rarely seeking out cheaper options like credit union cards. This behavioral pattern means that cutting rates is an ineffective customer acquisition strategy. Instead, issuers invest heavily in marketing, which proves more effective at attracting new borrowers.

Affirm's CEO argues the core flaw of credit cards is not high APRs, but a business model that profits from consumer mistakes. Lenders are incentivized by compounding interest and late fees, meaning they benefit when customers take longer to pay and stumble.