An investor is holding 2000 shares of technology index ETF, currently trading at $315 per share. He believes that technology stocks will outperform other shares, but he is worried about a temporary drop in the market that might affect his portfolio due to its high beta of 2.4. Calculate the delta of one share in the tech ETF, if the market proxy is the SPY, currently trading at $280 per share. Use this information to determine how many SPY put options should the investor buy/sell, if the put's delta is -0.67.