** RBL Bank RATB.NS stock climbs 3.7% to 248.27 rupees, nears one-year high
** Citi starts 90-day catalyst watch on lender's stock and hikes PT to 285 rupees from 230 rupees, implying 15.4% upside to RATB's current price
** Says return on assets to improve 45-50 bps driven by credit cost normalisation
** Adds, slippage to moderate to 4.5% in Q1 from 4.7% in Q4 with stress in credit cards vertical to also subside
** Avg rating on RATB at "buy"; median PT is 220 rupees - data compiled by LSEG
** Stock extends YTD gains to nearly 57%
(Reporting by Kashish Tandon in Bengaluru)
((Kashish.tandon@thomsonreuters.com))