ExlService Falls After Confidentiality Breach

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ExlService Holdings Inc. tumbled the most since its 2006 public offering after losing a deal with Travelers Cos. that accounted for almost 10 percent of revenue because of a failure to protect the insurer’s confidential data.

ExlService, which provides offshore business-process services, plunged 20 percent to $23.36 at 4 p.m. The company has dropped about 12 percent this year.