Key benchmark indices are trading lower in early trade on selling pressure in index pivotals. At 9:25 IST, the barometer index, the S&P BSE Sensex, was down 256.32 points or 0.49% at 51,678.56. The Nifty 50 index was down 68.30 points or 0.44% at 15,506.55. Rise in crude oil prices impacted sentiment. Asian stocks are trading mixed. Oil prices rose on June 2 after OPEC and its allies stuck to their plan to cautiously return oil supply in June and July while expecting fuel demand to rebound strongly during the US summer. Brent crude futures climbed 37 cents, or 0.5%, to $70.62 a barrel, after jumping 1.3% overnight, when it hit its highest since March 8.