mumbai, April 21 -- The Reserve Bank of India (RBI) on Monday eased parts of its foreign exchange rules for banks, allowing certain related-party hedging transactions to continue and clarifying that they will not be treated as speculative trades. Banks can continue undertaking back-to-back hedging transactions, including across overseas branches, as long as they are genuine risk-offsetting trades. The overall $100 million net open position (NOP) limit remains unchanged, and the revised rules take effect immediately, the central bank said in a circular. The central bank has also allowed banks to retain existing positions within the $100 million cap until maturity, or modify them if required, removing the need for premature unwinding. "If it'...