Stock Market Today: Dow Falls On Trump's 'Economic D-Day' Threat; Walmart Dives | Investor's Business DailySectionsMy IBDMy ProductsRecently SearchedStock Market TodayLicensingSCOTT LEHTONEN08:16 AM ET 08/20/2026Futures for the Dow Jones Industrial Average and the other major stock indexes traded lower Thursday after President Donald Trump threatened Iran with the "most crushing economic operation ever taken against any country." Meanwhile, Walmart (WMT) plunged on the stock market today after the discount retailer's earnings report. Ahead of Thursday's open, Dow futures dropped 0.7%, as S&P 500 futures…Copyright ©2026 Investor's Business Daily, LLC. All rights reserved. 87990cbe856818d5eddac44c7b1cdeb8INVESTING RESOURCESTake a Trial TodayGet instant access to exclusive stock lists, expert market analysis and powerful tools with 2 months of IBD Digital for only $20!IBD VideosGet market updates, educational videos, webinars, and stock analysis.Get StartedLearn how you can make more money with IBD's investing tools, top-performing stock lists, and educational content. ]]>