Stocks Slip Before the Open on U.S.-Iran Fears, Economic Data and Walmart Earnings on Tap

March S&P 500 E-Mini futures (ESH26) are down -0.32%, and March Nasdaq 100 E-Mini futures (NQH26) are down -0.36% this morning, pointing to a lower open on Wall Street amid mounting concerns that a U.S. strike against Iran could be imminent. Investors remain on edge about the prospect of U.S. military intervention in Iran, even as talks on Tehran’s nuclear program in Geneva showed signs of progress. The Wall Street Journal reported on Wednesday that the U.S. has assembled its largest air power presence in the Middle East since the 2003 invasion of Iraq and is in a position to…