There’s a reason why we’re the only Fortune 500 company with an exclamation point at the end of our name, and now is the time to demonstrate what that exclamation point stands for.”

–Yahoo CEO Jerry Yang

The market is finally having its say about the collapse of the Microsoft-Yahoo deal and its words are far from kind. Shares of Yahoo (YHOO) plunged some 21% in premarket trading this morning after Microsoft (MSFT) abandoned its takeover bid, wiping out about $8.7 billion of the company’s market value. Yahoo’s current premarket price is about 30% below Microsoft’s final offer of $33 a share, which the company deemed inadequate.

Meanwhile, investors are eyeing the market’s opening with a dark, albeit bemused, cynicism–as well as a little wish-it-were-so fancy. From the YHOO message boards this morning …

Fed Opens Yahoo Lending Facility

In response to recent events [the] Federal Reserve Board voted unanimously to authorize the Federal Reserve Bank of New York to create a Yahoo Lending Facility (YLF) to avoid significant stock market disruption and to support Yahoo Inc. shares. Yahoo Inc. and its authorized agents will be able to borrow from the facility to support stock price.

This facility will be available for business on Monday, May 5. It will be in place for at least six months and may be extended as conditions warrant. The interest rate charged on the credit will be the same as the primary credit rate, or discount rate, at the Federal Reserve Bank of New York.

In addition, Yahoo Inc. shareholders who are unable to sell their shares at or above Friday, May 2 closing price, will be able to swap Yahoo shares for the U.S. Treasuries at the set price of $29.70 per share.”

UPDATE:

A few moments after market open, Yahoo is down 17.2% to $23.79. Microsoft is up a little over 2% to $29.83.