Credit a 'short squeeze' for the stock market's big two-day bounce
1. Short sellers' covering drove a significant market rally recently. 2. Goldman Sachs noted increased bearish bets among hedge funds. 3. Market rally lacks strong conviction despite short-covering trends. 4. Trump's trade comments sparked market optimism but no real deals exist. 5. S&P 500 rose 3.5% amid ongoing market volatility.