Stock market today, April 20 -- The domestic benchmark indices, Nifty 50 and Sensex opened on a cautious and slightly negative note on Monday, April 20 as investor sentiment weakened amid rising uncertainty over US-Iran negotiations and mixed signals from leadership on both sides.

The benchmark indices mirrored the subdued mood in early trade. However, until noon, Sensex climbed 314.84 points (0.40%) to 78,808.38, while the Nifty 50 jumped 98.85 points (0.42%) to 24,455 . 85 at 12:25 am.

Uncertainty around the progress of peace talks has unsettled markets. Although a temporary ceasefire had initially raised hopes of a diplomatic resolution, recent conflicting statements have raised doubts about its sustainability. This lack of clarity h...