The Nasdaq 100 jumped in midday trading Monday as crude oil prices retreated from last week's record highs, quelling inflation concerns, though bond insurer MBIA Inc. posted a large first-quarter loss.
The index, which includes 100 of the largest nonfinancial securities listed on the Nasdaq Stock Market, added 25.40 points to 1,985.69 in midday trading. The broader Nasdaq composite rose 31.44 points to 2,476.96.
Shares of Research in Motion Ltd. rose $8.09, or 6 percent, to $140.86 after hitting an all-time high of $140.88 earlier in the session. The smart-phone maker unveiled its latest BlackBerry model on Monday.
Shares of chipmaker Flextronics International Ltd. gained 46 cents, or 4.4 percent, to $10.97.
And shares of Sirius Satellite Radio Inc. gained 10 cents, or 3.7 percent, to $2.83 following first-quarter results from rival XM Satellite Radio Holdings.
On the falling side, shares of Discovery Holdings Co., which posted first-quarter results Friday, fell 91 cents, or 3.4 percent, to $25.62.
Shares of Yahoo Inc. fell 64 cents, or 2.4 percent, to $25.31.
And shares of video game publisher Activision Inc. dropped 73 cents, or 2.3 percent, to $30.91. Data on video game sales is slated to be released after the market closes Thursday.