S&P 500 futures fell 0.3% in premarket trading as geopolitical tensions escalated. China launched investigations into US trade practices while Israel announced plans to expand attacks on Iran. These developments raised concerns about potential disruptions to global markets and increased risk aversion among investors ahead of the regular trading session.

Among individual movers, Argan, Rocket Pharmaceuticals, and Unity attracted attention before the opening bell. While specific price movements weren't detailed in the source, these companies likely saw unusual trading activity as investors digested the broader market implications of the geopolitical developments.

The confluence of US-China trade tensions and Middle East hostilities creates a challenging environment for investors. Companies with international exposure may face increased volatility as market participants reassess risk factors. The premarket action suggests traders are positioning for potential market turbulence driven by these geopolitical uncertainties.