HONG KONG: Oil prices climbed on Tuesday (May 12) as US-Iran talks stalled, while markets were mixed as traders appeared to shrug off uncertainty over the 10-week-old war.  Optimism over Washington's proposal to Iran to ease the conflict collapsed when Trump told reporters on Monday that Iran's counteroffer was "garbage". Trump warned that Tehran's rejection of his administration's demands meant the already tenuous ceasefire is now "unbelievably weak". The impasse, which leaves the vital Strait