Because hedge funds will bid up a stock that no one else is allowed to buy? I thought they like to make money. Markets are often undervalued due to restriction

Because hedge funds will bid up a stock that no one else is allowed to buy? I thought they like to make money. Markets are often undervalued due to restrictions on buyers. The bull case for the stock is that AAPL will make itself the buyer of last resort, as I expect them to do this earnings announcement. Knowing that the stock is undervalued and that any price increase due to their purchases will be maintained by the market, they can confidently buy the stock back. Dividends can have a similar effect to a buyback, and also expose the stock to dividend focused funds. Large cap companies often must resort to these tactics to increase the number of available buyers when their stock is widely owned.