Mumbai, Sept. 19 -- The Indian rupee extended weakness in opening trades on Friday tracking a firm dollar overseas. INR opened at Rs 88.22 per dollar and is staying a narrow range so far during the day. Yesterday, rupee slipped back beyond 88 per dollar mark as greenback regained momentum after Fed sounded cautious on further rate cuts. INR depreciated 28 paise to close at 88.13 against the US dollar. The US FED reduced rates by a quarter point as expected and indicated that it will steadily lower borrowing costs for the rest of the year. However, cautionary appearance from Fed Chair Jerome Powell bolstered the US Dollar. In considering additional adjustments to the target range for the federal funds rate, the Committee said it will caref...