Diodes, Goodyear, Chelsea, RealD, Travelers: U.S. Equity Movers

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.

Tire makers declined as JPMorgan Chase & Co. said U.S. consumer demand for replacements fell 3 percent in May from the previous month, below the average 8 percent growth rate in the past nine years. Goodyear Tire & Rubber Co. (GT US) fell 6.7 percent, the most since Oct. 28, to $14.99. Cooper Tire & Rubber Co. (CTB US) dropped 7.1 percent, the most since Aug. 5, to $19.73.

Chelsea Therapeutics International Ltd. (CHTP US) surged the most in the Russell 2000 Index, jumping 13 percent to $4.75. The biotechnology company said data from trials showed its Northera treatment for neurogenic orthostatic hypotension, a condition in which blood pressure drops when a person stands, provides “durable beneficial effects.”

Diodes Inc. (DIOD US) dropped 14 percent, the most since December 2008, to $23.61. The semiconductor maker reduced its second-quarter gross-margin forecast, saying it now expects 32.5 percent, plus or minus 1.5 percent.

Life Partners Holdings Inc. (LPHI US) declined 14 percent to $3.25, the lowest price since October 2006. The company that matches life insurance sellers with buyers said Ernst & Young LLP resigned as an auditor.

Micromet Inc. (MITI US) rose 8.7 percent, the most since April 6, to $5.75. The biotechnology company with no marketed products said its experimental medicine was shown to help leukemia patients reach remission in interim study results.

RealD Inc. (RLD US) slumped a record 13 percent to $20.90. The maker of equipment cinemas use to show movies in 3-D dropped after analysts questioned company executives about the appeal of the format.

Travelers Cos. (TRV US) fell 3.1 percent, the most since Nov. 16, to $59.21. The insurer added said it’s scaling back share repurchases as about $1 billion in catastrophe costs will probably wipe out second-quarter operating profit.

Verigy Ltd. (VRGY US) rallied 11 percent, the most since Dec. 6, to $14.96. The U.S. maker of testing equipment for the semiconductor industry received a notification from the Department of Justice that its antitrust waiting period has ended for its merger with Advantest Corp. and the department has closed its investigation.

Yongye International Inc. (YONG US) surged 9.9 percent, the most since May 31, to $4.67. The Chinese seller of plant nutrients closed on its $50 million investment from Morgan Stanley’s Asian private equity unit.

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