NEW YORK - WorldCom Group has set a Wall Street record, but the company and shareholders likely aren't celebrating. <br>
<br>
The struggling telecommunications firm is now the most heavily traded stock in a single day in U.S. history. <br>
<br>
More than 550 million shares changed hands by the close of regular trading on the Nasdaq stock market. <br>
<br>
Then more than 100 million shares changed hands in the after-hours session. <br>
<br>
Investors were reacting to news that Standard and Poor's has dropped the stock from the S&P 500. <br>
<br>
That announcement prompted mutual fund managers who attempt to mirror performance of the index to sell the stock. <br>
<br>
The one-day volume record had been held by Enron, the bankrupt energy trader. <br>
<br>
WorldCom Group shares ended regular trading down 20 cents or 14 percent at $1.24.
