Frightened investors may have sliced off nearly 15 percent of the Nasdaq’s value this year, but that’s nothing compared to the damage suffered by Wilson Sonsini Goodrich & Rosati’s stock portfolio.

An aggressive investor in clients, the Palo Alto, Calif., firm was toasting a 1999 portfolio worth an estimated $230 million at year’s end. But by mid-April, Wilson Sonsini’s portfolio had dropped in value by 60 percent to a paltry $91.5 million.