Quadruple witching may fuel volatility today as the expiry of options and futures typically pumps up volume as big derivatives positions roll over. There may be more attention than usual after a month where the red-hot trade in tech stocks wavered and options activity dominated headlines. But there are fewer expirations this time, which may mute the impact. If you're heavily long tech, it may be a real fireworks show, said Baird strategist Michael Antonelli.