Crude oil futures gained on Tuesday and reached their highest level in seven weeks as investors were still uncertain after the speech of US Federal Reserve’s Chairman Ben Bernanke. Bernanke gave no hints on further easing measures and admitted that US economy is still slow.

Crude oil futures contract for August delivery surged 0.9 percent or $0.79 to settle at $89.22 per barrel on the New York Mercantile Exchange.