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Other Wall Street stocks making big moves included:

— Navistar International. The truck maker’s stock fell $4.37, or over 15 percent, to $24.42 on investor worries that the heavy engine and truck maker will have to incur additional costs to get a crucial new engine approved by federal regulators.

— Sequenom Inc. The stock fell 8 cents, or 2 percent, to $3.99 after a California court refused to block a competitor from selling a similar product to Sequenom’s Down syndrome test for pregnant women.

— Informatica Corp. The business software maker fell $12, or 28 percent, to $31.36 after warning that its second-quarter results didn’t live up to the projections of its management or analysts.