VeriSign Inc plunged US$8.35, or 46 percent, to US$9.89. The company that registers Internet addresses lowered second-quarter sales and earnings forecasts.
Intel, the biggest chipmaker, slid US$0.97 to US$28.12.
Disney dropped US$0.90 to US$24.10. UBS Warburg analyst Christopher Dixon said investors should stop buying its shares until ratings at the company's ABC television network improve. Dixon cut his recommendation to "hold" from "buy." While Disney said first-quarter earnings topped expectations, revenue declined.
Dixon also lowered Viacom to "buy" from "strong buy," telling clients in a research note that shares will rise less than 20 percent over the next year. Viacom slid US$1.63 to US$48.21.
AOL Time Warner Inc, the biggest Internet and media company, fell US$0.77 to US$18.72.
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