By Harizah Hanim Mohamed & Muhammad Fawwaz Thaqif Nor Afandi KUALA LUMPUR, March 1 (Bernama) -- Global markets turned cautious on Sunday following the latest United States military action against Iran, with economists warning that heightened geopolitical risks due to the situation in the Middle East could reinforce risk-off sentiment and affect oil prices, the ringgit, and trade flows, said analysts.