The Indian stock market, led by the Nifty, reached a 13-month high, crossing 26,200. This surge is attributed to optimism surrounding a US trade deal, strong buying from Foreign Portfolio Investors (FPIs) and Domestic Institutional Investors (DIIs), and short-covering in derivatives. Index heavyweights HDFC Bank and Reliance Industries played a key role. Experts anticipate the rally may continue but advise caution as the sustainability hinges on upcoming earnings.