Iron ore futures in Singapore surged toward $100 a ton — the highest since May — fueled by renewed pledges from the Chinese government to curb overcapacity in key industrial sectors. Beijing's comments have boosted sentiment across ferrous markets. Singapore futures jumped as much as 3.6% during the session, marking the largest daily gain since September. Iron ore futures have traded in a tight range between $90 and $110 a ton for more than 18 months. Futures on the Dalian Exchange — which are more influenced by the Chinese…