** Indian banks .NSEBANK fall 2.6%; benchmark Nifty 50 index .NSEI drops 1.9%
** Late on Wednesday, RBI barred banks from offering rupee non-deliverable forwards to resident, non-resident clients
** Curbs on corporate activity make it costlier for lenders to cut arbitrage positions, potentially saddling them with larger losses
** On Monday, banks had relied on corporate arbitrage flows to help reduce exposures in line with RBI's earlier directive
** Jefferies says this can lead to higher rupee appreciation, loss for banks at ~40 bln rupee ($428.7 mln)-50 bln rupees vs earlier estimate of 30 bln-40 bln rupees
** AU Small Finance Bank AUFI.NS falls most, losing 4.4%
** Largest lenders SBI SBI.NS, HDFC Bank HDBK.NS, ICICI Bank ICBK.NS down ~3%, 1.7% and 1.5%, respectively
** YTD, NSEBANK down ~16%, NSEI down 14.85%
($1 = 93.3030 Indian rupees)
(Reporting by Urvi Dugar in Bengaluru)
((UrviManoj.Dugar@thomsonreuters.com;))