U.S. stocks were poised to open slightly lower following Wednesday's session, as the market resumed trading after the Juneteenth holiday. Investors continued to evaluate the extent of geopolitical tensions and their implications for the U.S. economic outlook. Futures for the three major indices hovered just below the flatline. President Trump indicated that a decision on whether to strike Iran could take up to two weeks, leaving room for potential negotiations. Nonetheless, Washington maintained a tough stance against Tehran, while Israel persisted in targeting Iranian nuclear sites, contributing to caution surrounding riskier stocks. On the corporate front, energy producers faced fluctuations as benchmark oil prices pared their gains. Meanwhile, CarMax was set to climb more than 10% following the release of strong financial results. Investors were also anticipating potential volatility ahead of the triple witching session, which involves the simultaneous expiration of stock index futures, stock index options, and stock options.