BroadVision will replace
( PWJ), which is being taken over by Swiss bank giant
S&P 500 index funds will have to buy about 17 million shares of BroadVision when it is added to the index after the close on Monday, according to
equity derivatives group -- about a day and a half of normal trading volume in the stock. Over 9 million PaineWebber shares will need to be sold.
Typically, some traders will buy a stock ahead of its addition to the S&P. Moreover, index funds will contract with brokerages to amass shares for delivery on the addition date.