A significant amount of investor wealth has been lost in the stock market, with estimates of the loss ranging from Rs 6.5 lakh cr to Rs 20 lakh cr. The Sensex has slumped, with some reports indicating a drop of over 1,500 points, and the Nifty has fallen below 25,000. The cause of the market decline is unclear, with possible factors including escalating tensions between Iran and Israel, as well as other economic pressures.