Facebook shares could also get a boost as short-sellers buy shares to deliver them three days after the first full day of trading.
About 18 million shares of Facebook, or 1 percent of the outstanding shares, are on loan—an indication that they may be sold short. Short sellers are required to buy or borrow additional shares to deliver them to buyers three days after the initial short sale.
If short sellers choose to cover—that is, buy the shares in order to make delivery—this could provide some buoyancy to the stock price.
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