Aggressive options trading helped drive the S&P 500’s latest rally. What that means for investors.

The S&P 500 has enjoyed an epic rally over the past five days — but the advance may be more mechanical and driven by options positioning, rather than by an improvement in investors’ fundamental outlook. The S&P 500 has enjoyed an epic rally over the past five days — but the advance may be more mechanical and driven by options positioning, rather than by an improvement in investors’ fundamental outlook.