Shares of the following companies had unusual moves in U.S. trading. Stock symbols are in parentheses, and prices are as of 4 p.m. in New York.
Altera Corp. (ALTR US) slipped 8.4 percent, the most since December 2008 to $35.25. The maker of programmable semiconductors reported first-quarter sales of $383.8 million, trailing the average analyst estimate of $422.5 million in a Bloomberg survey.
Cepheid Inc. (CPHD US) fell 6.5 percent, the most since Aug. 18, to $37.96. The maker of a rapid test for the drug-resistant staph infection known as MRSA lowered its forecast for adjusted earnings in 2012 to between 50 cents and 55 cents a share from a previous projection of as much as 60 cents.
E*Trade Financial Corp. (ETFC US) rose 6.1 percent to $10.48 for the biggest gain in the Standard & Poor’s 500 Index. The online brokerage reported first-quarter revenue of $489.4 million, beating the average analyst estimate of $472.5 million in a Bloomberg survey.
Expeditors International of Washington Inc. (EXPD US) sank 8.3 percent to $41.96, the lowest price since Jan. 9. The manager of cargo ships said preliminary results showed it earned 37 cents a share at most in the first quarter. That missed the average analyst estimate of 43 cents in a Bloomberg survey.
Extreme Networks Inc. (EXTR US) fell 12 percent, the most since Aug. 8, to $3.82. The maker of Ethernet switching equipment for data networks said fiscal third-quarter earnings missed its forecast.
Ezcorp Inc. (EZPW US) slid 14 percent, the most since June 2009, to $26.21. The short-term cash lender forecast earnings in 2012 to be no more than $2.95 a share, down from an earlier projection of at least $3.05 and below the average analyst estimate of $3.06.
Hanesbrands Inc. (HBI US) jumped the most in the Russell 1000 Index, gaining 11 percent to $30.02. The underwear and clothing maker reported a narrower first-quarter loss than analysts estimated and said sales are “running above” its plan.
Infoblox Inc. (BLOX US) surged 33 percent to $21.30 in the first day of trading. The network and data-services provider raised $120 million in an initial public offering, selling 7.5 million shares at $16 apiece.
Intuit Inc. (INTU US) fell 6 percent, the most since Aug. 10, to $57.25. The provider of tax and personal-finance software said revenue for the fiscal third quarter will be “at or slightly below the low end of its previous” forecast.
Ixia (XXIA US) rallied 9.1 percent, the most since Feb. 3, to $12.23. The provider of test equipment for high-speed networks reported first-quarter sales of $85.6 million, beating analysts’ estimates. Wunderlich Securities Inc. boosted the stock to buy from hold.
Microsoft Corp. (MSFT US) increased 4.6 percent to $32.42 for the biggest gain in the Dow Jones Industrial Average. The world’s largest software maker reported fiscal third-quarter profit that topped estimates on better-than-expected corporate software sales.
Motorcar Parts of America Inc. (MPAA US) tumbled 15 percent to $8.17, the biggest decline in the Russell 2000 Index. The manufacturer of replacement alternators and starters for cars and trucks said its offering 1.94 million shares at $7.75 each.
Riverbed Technology Inc. (RVBD US) plunged 28 percent, the most in the Russell 1000 Index, to $19.85. The maker of computer-networking products reported first-quarter sales of $183 million, missing the average analyst estimate of $186.1 million.
SanDisk Corp. (SNDK US) fell the most in the S&P 500, tumbling 11 percent to $35.91. The biggest maker of flash-memory cards posted first-quarter earnings of 63 cents a share excluding some items, missing the average analyst estimate by 4 cents. The company also had its rating cut at Piper Jaffray Cos. and Credit Agricole Securities USA Inc.
Tempur-Pedic International Inc. (TPX US) erased 21 percent, the most since March 2008, to $66.53. The maker of luxury mattresses reaffirmed its forecasts for earnings and sales in 2012, which fell short of analysts’ estimates.