The legendary investor only owns a few bank stocks, but Capital One is still in the portfolio.Around the time of several high-profile bank failures in 2023, Warren Buffett chose to get rid of several bank stocks in Berkshire Hathaway's (BRK.A -0.67%) (BRK.B -0.51%) portfolio. But there are still a select few in which he's chosen to invest billions of dollars, and one of them is online-focused regional bank Capital One Financial (COF -0.14%).Here's a quick look at how much Capital One stock Buffett owns, how ...