Why did Berkshire Hathaway sell all its shares in Visa and Mastercard?

Berkshire sold every share it owned in Visa (V) and Mastercard (MA) after Greg Abel began cleaning up parts of the stock portfolio tied to former investment manager Todd Combs. The sale came out in Berkshire Hathaway’s latest quarterly filing on Friday, and investors spent Monday reading through the new buys, cuts, and full exits....