U.S. and global benchmark oil prices have seen their share of big moves since Israel launched attacks on Iran late last week, but there’s one indicator that helps investors put into perspective just how serious the situation is — and can become.

New Jersey gas prices inched up over the past week as hostilities between Israel and Iran rattle global oil markets and push up petroleum costs.

Stock futures rebounded slightly early Monday as the spike in oil prices due to the escalating conflict between Israel and Iran eased for a moment. Stock gains were muted as investors remained concerned about the rising geopolitical risk to the global economy.