Mumbai, Aug. 21 -- Domestic equities eked out modest gains on Thursday, stretching their winning streak to a sixth straight session. Optimism over a potential cut in Goods and Services Tax (GST) supported sentiment, though caution lingered ahead of the US Federal Reserve's annual symposium for cues on interest rate policy.

The Nifty closed above the 25,050 mark, lifted by strength in pharma and healthcare counters, while FMCG, PSU bank and auto stocks dragged on the upside.

The S&P BSE Sensex advanced 142.87 points or 0.17% to 82,000.71. The Nifty 50 index added 0.13 points or 0.33.20% to 25,083.75. In the six trading sessions, the Sensex and Nifty have jumped 2.19% and 2.43%, respectively.

ICICI Bank (up 1.09%), Bajaj Finance (up 0.90...