HONG KONG, China  (AFP) — Oil prices surged, gold hit a more than six-year high and equities tumbled Monday after the US assassination of a top Iranian general last week fanned fears of a major conflict in the Middle East. Donald Trump warned of a “major retaliation” against Tehran after it threatened revenge for the killing Friday of commander Qasem Soleimani, which shocked world markets and sparking a sell-off in stocks and a spike in crude. […]