<h1>Rupee Drops to 86.40 Against US Dollar as Dollar Strengthens; Forex Traders Advise Caution Amid Volatility.</h1> The rupee fell by 5 paise to 86.40 against the US dollar in early trade, influenced by a strengthening dollar. Despite a decline in crude oil prices and a rise in domestic equity markets, the rupee remained volatile, expected to trade between 86.20-86.60. It initially opened weaker at 86.46 and dropped to 86.52 before recovering to 86.40. Forex traders suggested exporters maintain a stop loss at 86.25 due to ongoing dollar demand. The dollar index rose slightly, while Brent crude prices decreased. Domestic equity markets showed gains, with the BSE Sensex and Nifty both rising.