USD/INR closed at 72.63 against its open at 72.47. Dollar/rupee ended up Monday as Brent crude oil prices surged above to $80 a barrel amid escalating US-China trade tension weighed on market sentiments.Brent crude oil prices jumped to a four-year high to trade above $80/bbl on Monday after OPEC declined to announce an immediate increase in production despite calls by US President Donald Trump for action to raise global supply amid overhanging US plan to impose new sanctions against Iran. Meanwhile the greenback gained against its major peers as safe haven demand was bid up on news that China cancelled trade talks with the US, with the market also eyeing this week's US Federal Reserve meeting for guidance on future rate hikes.......