New Delhi, Sep 29 (UNI) Indian Stock Markets on Tuesday ended lower in a volatile session with the Nifty closing around 22,700 amid F&O expiry. Persistent FII selling, a weakening rupee, rising crude oil prices and elevated US Treasury yields continued to weigh on sentiment. At close, the Sensex was down 242.65 points or 0.33 percent at 72,529.07, and the Nifty was down 64.05 points or 0.28 percent at 22,716.20. Nifty midcap index declining 0.6 percent and smallcap index falling 0.8 percent.