By Caroline Valetkevitch
NEW YORK (Reuters) - With some of Wall Street's most volatile names on the earnings calendar next week, investors may want to keep the antacids handy.
More positive U.S. earnings are expected, but investors are less certain how much of a boost the stock market might get from good results after a slump in the shares of Google Inc
Several companies reporting results in the coming week are traditionally among the most volatile after they release quarterly numbers, according to Bespoke Investment Group of Harrison, New York.
A prime example: The stock of flash memory card maker SanDisk Corp.
Shares of online merchant Amazon.com
Other volatile names include Internet company Yahoo
What's more, estimates have been rising, with first-quarter earnings now seen increasing 39 percent from a year ago, up from an estimate of a 36.6 percent increase on April 1, according to Thomson Reuters data.
"Expectations are sky high ... people are looking at this and saying, 'No doubt, the market has too high expectations,'" said Burt White, managing director and chief investment officer of LPL Financial in Boston.
GOOGLE AND GOLDMAN
This week, the performance of stocks after companies release results has been uneven, at best.
On Wednesday, the Standard & Poor's 500 Index <.SPX> closed above 1,200 for the first time since September 2008 when Lehman Brothers collapsed. The S&P's jump above that 1,200 milestone followed strong results from Intel Corp
But the response following bellwether results later in the week was not as strong. Shares of Google, which reported quarterly results that beat forecasts after Thursday's closing bell, fell 7.6 percent on Friday to end at $550.15 on Nasdaq.
On Friday, Bank of America's
News on Friday that Goldman Sachs
Of the 48 companies in the S&P 500 that have reported earnings so far, 83 percent have beaten expectations -- well ahead of the 61 percent in a typical quarter, said John Butters, director of U.S. earnings for Thomson Reuters.
The high percentage follows the trend of recent earnings periods, with 70 percent or more S&P 500 companies beating estimates.
Next week, 123 S&P companies are expected to report quarterly results, including International Business Machines
(Reporting by Caroline Valetkevitch; Additional reporting by Chuck Mikolajczak; Editing by Jan Paschal)