The Reserve Bank of India’s special dollar window for state-run oil marketing companies could shift around $11-12 billion in monthly dollar demand away from the spot foreign-exchange market, easing pressure on the rupee and lowering treasury and hedging costs for Indian Oil, BPCL and HPCL, according to industry experts. The RBI opened the special window on October 12 to meet the entire daily dollar requirement of IOC, BPCL and HPCL, allowing the companies to buy dollars through designated banks rather than compete for them in the spot market.