Indian markets opened lower Friday, with Nifty falling below 25,000 after a six-day rally. Financials and metals weighed, while pharma and select consumer stocks lent support. Divi's Labs rose 2% on a Citi upgrade, and R Systems surged 12% on an acquisition. Analysts suggest a buy-on-dips strategy ahead of US Fed Chair Powell's Jackson Hole speech for global cues.