Ford Motor Company (F)

[mkendra]

As determined by the Securities and Exchange Commission, which is in charge of IPO regulation in the U.S., the underwriters of the IPO are not allowed to lend out shares for short sale for 30 days. On the other hand, institutional and retail investors can lend out their shares to investors who want to short them.

In other words, it's probably very difficult, if not impossible to find shares of GM stock to short this early in the game.