Big bank stocks include JPMorgan Chase (JPM), Bank of America (BAC), and Goldman Sachs (GS). "This big bank stocks performance momentum made perfect sense. Yes, there were supply-chain bottlenecks and creeping worries about inflation, but all of that was due to a red-hot economy that drove trading and investment banking volumes into record territory and raised optimism about loan demand," says Sheraz Mian. He also weighs in on interest rates going up and how that benefited financial stocks directly through improved margins.