** Indian city gas distributor stocks GAIL (India) Ltd GAIL.NS, Gujarat State Petronet Ltd GSPT.NS, and Indraprastha Gas Ltd IGAS.NS rise between 2.4% and 4%
** India's natural gas regulator proposes lower pipeline tariffs
** Morgan Stanley analysts estimate GAIl, GSPT could see 8%-10% rise in earnings due to proposed regulations; GAIL's return on investments could also improve
** CLSA says IGAS likely to be biggest benefactor of proposed norms, which would help bring down operating expenses
** IGAS' ~1.5% YTD drop least among pack; GAIL down 4.4%, while GSPT down 18.3%
(Reporting by Nandan Mandayam in Bengaluru)
((Nandan.Mandayam@thomsonreuters.com; Mobile: +91 9591011727;))