Technology Traders Head for the Exit as Put Trades Surge

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Two weeks of selling in the Nasdaq 100 Index, where valuations are double the rest of the market, has sent anxiety among options traders to the highest levels since the flash crash four years ago.

More than 1 million put options on an exchange-traded fund tracking the Nasdaq index changed hands on April 4 as investors sought protection during a 2.7 percent drop in the gauge. That’s the most trading in bearish contracts since May 7, 2010, the day after $862 billion was erased from the value of U.S. stocks in a matter of minutes. King Digital Entertainment Plc has slid 16 percent since going public March 26.