Mumbai, Sept. 18 -- The Indian rupee slipped back beyond 88 per dollar mark as greenback regained momentum as Fed sounded cautious on further rate cuts. INR depreciated 28 paise to close at 88.13 (provisional) against the US dollar on Thursday. 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 carefully assess incoming data, the evolving outlook, and the balance of risks. Moreover, the rupee remained under pressure on worries over US tariffs on India and g...