DOW JONES NEWSWIRES 
 

The New York Stock Exchange said late Wednesday it erroneously posted a notice of suspension and delisting for American International Group Inc. (AIG) on its Web site.

AIG shares closed down 22% at $18.08, a day after the ailing insurer's shareholders approved a 1-for-20 reverse stock split.

In a statement, the NYSE said AIG isn't subject to delisting, and the post was removed upon discovery. The exchange typically issues delisting or suspension notices when a company's stock falls below $1 a share or its market capitalization drops below $25 million. It eased those rules amid the economic downturn as once-healthy companies saw their share prices plummet.

Shares of companies that undertake reverse splits often fall as investors remain skeptical about such firms' prospects.

In addition, some market participants noted that AIG's sharp decline Wednesday could be because it is easier to short higher-priced stocks. Also, many of those trading in AIG shares were purely speculating and liked having the stock around $1, so those folks likely sold Wednesday.

The New York Stock Exchange is part oF NYSE Euronext (NYX).

-By Lauren Pollock, Dow Jones Newswires; 212-416-2356; lauren.pollock@dowjones.com

(Geoff Rogow contributed to this report.)