You didn't see the bank among the airline shareholders, but you read the full name carefully. Those so-called funds are actually bank funds, and banks cannot become major shareholders of airlines. The reason why the fund buys aviation stocks is because of its small circulation (relative to banks, steel and other stocks) and rich themes. The price is cheaper and the name sounds loud, which is easy for ordinary retail investors to accept. (For example, how much is a plane? Wait ...)