Friday could see a surge in trading activity due to triple witch option expirations and S&P index rebalance trades, NYSE's Michael Reinking said.

Stocks were choppy Friday as market participants took a breather following Thursday's Fed-fueled rally. While buzz continued to swirl around the Federal Reserve's jumbo-sized rate cut from earlier this week, today's headlines centered mostly on single-stock news, including Nike's ( NKE) big C-suite shake-up.

After Fed rate cut, the next 6 months will be crucial for investors. Here’s why. Traders brace for volatility as more than $5 trillion in options set to expire in latest ‘triple witching’. Nvidia’s stock is surging. Here’s how it tends to perform after interest-rate cuts.