<h1>Rupee Gains 13 Paise to 86.40 Against Dollar Amid Positive Markets, Declining Oil Prices, and Weakened US Dollar.</h1> The rupee appreciated by 13 paise to settle at 86.40 against the US dollar, driven by positive domestic equity markets and declining crude oil prices. The American dollar weakened due to lower-than-expected US producer price index data, despite ongoing foreign institutional investor outflows. Analysts suggest that persistent US inflation may bolster the dollar, exerting pressure on the rupee. The dollar index fell by 0.22%, while Brent crude rose slightly. In domestic markets, the BSE Sensex and Nifty showed modest gains. Recent data indicated a rise in wholesale inflation but a decline in retail inflation, potentially influencing the Reserve Bank of India's interest rate decisions.