What does Warren Buffett's exit on airlines mean to Index fund/ETF?

Means he finally adhere to his own advice "not investing in industries where its bad economics mostly prevailed against the best mgmt team" + even WB can get it wrong so retail investors should stop relying on WB's picks & do their own due diligence

Interesting question: For every seller, there's a buyer. Warren Buffett's sold shares went to someone, and given the sizes of index funds and ETFs, some probably went to them.