Warren Buffett's top stock last year was the bank he's been bailing on

Warren Buffett’s best-performing stock last year? One he’s been dumping.

Wells Fargo & Co. shares delivered a total return of 61% last year, outpacing every other company listed in the most recent public snapshot of Berkshire Hathaway Inc.’s portfolio, as of Sept. 30, according to data compiled by Bloomberg. That trounced the performance of the conglomerate’s two biggest bets, Apple Inc. and Bank of America Corp.

Buffett’s Berkshire will give investors an updated look at its holdings in coming days. Already, its filings show that Wells Fargo’s rebound was largely a missed opportunity. For years, the San Francisco-based bank ranked as the