Stock index futures advance on U.

Stock index futures advance on U.S.-Iran peace talks optimism. Nasdaq 100 futures rose 0.41% while S&P 500 futures gained 0.25% on Tuesday as investors grew increasingly optimistic about potential diplomatic negotiations between the U.S. and Iran. The prospect of peace talks has eased concerns about Middle East tensions, which have historically created volatility in equities and commodity markets. Geopolitical de-escalation typically reduces risk premiums across asset classes and encourages risk-on sentiment among investors. Market participants are closely monitoring developments in these negotiations, as any progress could support broader market strength and reduce safe-haven demand that often pressures equity valuations during periods of heightened global uncertainty.