BENGALURU, May 25 (Reuters) - Indian shares opened lower on Thursday, tracking a slide in global equities as U.S. debt ceiling negotiations continued with no resolution in sight and weighed on sentiment.

The blue-chip Nifty 50 index was down 0.11% at 18,266.15 as of 9:15 a.m. IST, while the benchmark S&P BSE Sensex fell 0.04% to 61,758.92. ($1 = 82.7271 Indian rupees) (Reporting by Bharath Rajeswaran in Bengaluru; Editing by Sonia Cheema and Sohini Goswami)