Tech giants Google and Apple were among the carnage of U.S. stocks mashed Monday as skeptical lawmakers sent the $700 billion Wall Street rescue plan down to defeat in the House.

The Dow Jones Industrial Average recovered from a precipitous 700-point midday drop to a still gut-churning 500-point downturn at mid-afternoon. The Nasdaq plunged 149, or 6.8 percent, to 2,034.

The 205-228 vote against the plan championed by the Bush administration and Treasury Secretary Henry Paulson left open the possibility of a vote on a revised bill in coming days.

In afternoon trading, Apple plunged $20.55, or 16 percent, to $107.69, while Google crossed the $400 level, losing $37.01, or 8.6 percent, to $394.03. The Morgan Stanley High Technology Index skidded 6.9 percent to 462.9. Among the double-digit percentage losers were: Nvidia, 10.4 percent, Alcatel Lucent, 15.2 percent, and Salesforce.com, 10.4 percent.  More pedestrian single-digit losses were recorded by Microsoft, 5.5 percent, Intel, 5.9 percent, and Cisco Systems, 6.6 percent.

The vote against the rescue measure was 228-205 as both Democrats and Republicans heeded the misgivings of constituents about legislation seen in some quarters as an undeserved reward for Wall Street’s misguided policies.