Crude oil futures surged higher Monday, helped by demand hopes and a weaker U.S. dollar.

Markets turned hopeful after a number of polls hinted that UK voters will reject a proposal to leave the European Union.

There is now optimism that Europe can avoid any potential problems rooted in such a break up.

July WTI oil settled at $49.37/bbl, up $1.39, or 2.9%.

An expected rise in U.S. rig counts put a cap on the day’s advance. Analysts say output from the U.S., Canada and Iran will rise as companies rush to capitalize on oil near $50.

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