By Victor Reklaitis, MarketWatch

NEW YORK (MarketWatch) -- U.S. stocks erased their gains on Friday, as steep losses for Oracle Corp. weighed on two of the benchmark stock indexes, a day after a massive selloff prompted by worries that the Federal Reserve may start winding down bond buying later this year.

The Nasdaq Composite (RIXF) lost 11 points, or 0.3%, to 3,353, as the tech-heavy index was hurt by a 9% drop in shares of Oracle Corp. (ORCL). The tech bellwether delivered a disappointing quarterly earnings report late Thursday.

The S&P 500 index (SPX) was nearly unchanged at 1,588, erasing gains, with Oracle the top decliner.

Information technology and materials led losses among its 10 major industry groups, while consumer staples posted the biggest gains.

The Dow Jones Industrial Average (DJI) gained 20 points, or 0.1%, to 14,778, with Procter & Gamble Co. (PG) its top gainer.

The main indexes all opened with solid gains, then pulled back from their session highs, with the Nasdaq turning negative.

The Dow's slide on Wednesday and Thursday -- a drop of 560 points or 3.66% -- was its worst two-day drop since the two sessions ended Nov. 1, 2011, both in terms of points and percentage.

"The rebound we're seeing in U.S. futures is simply due to the fact that investors overreacted to [Federal Reserve Chairman] Ben Bernanke's comments on Wednesday," said Craig Erlam, market analyst with Alpari U.K., in emailed remarks early Friday.

Goldman Sachs analysts said Friday in a note that their top recommendations for 2013 is still to buy stocks and sell bonds.

"We continue to expect the index will close the year at 1,750, a rise of approximately 10% from today's level," the analysts wrote.

"However, median historical drawdown episodes suggest at some point during the next six months that the S&P 500 may decline to the mid-1,500s before rebounding to our year-end target."

Jonathan Krinsky, chief technical strategist at Miller Tabak, also sees potential support for the S&P 500 in the mid-1,500s. "We have just broken the psychological 1,600 level after two prior tests, which now creates short-term resistance in the 1,598 to 1,608 range," Krinsky wrote in a note.

"There should be downside support in the 1,550-1,575 area, which marked major resistance over the last decade."

Friday is a quadruple-witching session, meaning expirations for index futures, options on index futures, single-stock futures and stock options. Such sessions can be the most heavily traded days of the year.

Investors also are absorbing remarks from St. Louis Federal Reserve President James Bullard, who explained on Friday why he voted against the latest Fed policy decision. Bullard said the decision by the Federal Reserve to lay out its plans to taper bond buys was badly timed. The Fed should have waited "for more tangible signs" of economic improvement and a halt in the downward direction for inflation, according to Bullard.

Facebook Inc. shares (FB) rose 2%. UBS analysts on Friday upgraded the social-network company to a buy rating, citing new monetization efforts and higher advertising revenue.

On Thursday, the Dow dived 354 points, or 2.34%, representing its largest one-day percentage decline since Nov. 7, the day after the U.S. election, and its largest one-day points drop since Nov. 9, 2011. Gold and oil prices also tumbled, while the dollar and the 10-year Treasury yield jumped.

On Friday, most Asian stocks continued to fall, though Japanese stocks advanced. European stocks were mixed.

Gold futures rose $8 to $1,294 an ounce, while oil edged down.

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