<h1>Sensex tumbles amid foreign fund outflows, rupee weakness and weak global cues, dragging Nifty below 26,000.</h1> Benchmark equity indices fell as persistent foreign institutional outflows, rupee weakness and weak global market trends pressured investor sentiment; Sensex dropped 533.50 points to 84,679.86 and Nifty to 25,860.10, with FIIs net sellers and DIIs net buyers, while global index weakness and lower Brent crude compounded the market decline.