US stock index futures fell nearly 1%, signaling a weaker open for equities as risk sentiment deteriorates. The move comes amid renewed geopolitical tensions after Iran reversed its decision to reopen the Strait of Hormuz, following the US refusal to lift its blockade on Iranian ports, dimming hopes for de-escalation. Optimism that had begun to build late last week has now faded, even as President Trump indicated that US negotiators will travel to Pakistan on Monday for further talks.