Investors are bracing for wild trading on Friday as first ‘triple witching’ of 2026 collides with Iran conflict

Site SearchClearSEARCHAdvanced Search ➔Search ResultsSymbolsNo results foundAll NewsArticlesVideoPodcasts0 ResultsNo Results FoundAuthorsNo results foundSectionsNo results foundColumnsNo results found Market ExtraInvestors are bracing for wild trading on Friday as first ‘triple witching’ of 2026 collides with Iran conflictAs if that wasn’t enough, Friday will also see the quarterly rebalancing of the S&P 500 indexPublished: March 19, 2026 at 5:27 p.m. ETShareResizeListen(6 min)Friday will also see the quarterly rebalancing of the S&P 500 index. Photo: MarketWatch photo illustration/iStockphotoFriday is the first day of spring. It is also the first “triple-witching” options expiration during what has already been a busy year for markets.Investors are bracing for what could be a doozy of a trading session. About the Author Joseph AdinolfiJoseph Adinolfi is a markets reporter at MarketWatch. Show Conversation (0)Back To TopA Dow Jones CompanyCopyright © 2026 MarketWatch, Inc. All rights reserved.Terms of UsePrivacy NoticeCookie NoticeArchive MarketwatchCustomer CenterContact UsNewslettersNewsroom RosterVirtual Stock ExchangeMarketWatch GuidesCopyright PolicyManage NotificationsCancel My SubscriptionCompanyDow JonesCode of ConductCorrectionsReprints & LicensingDigital Self ServiceYour Ad ChoicesCorporate SubscriptionsAccessibilityDow Jones NetworkThe Wall Street JournalBarron'sInvestor's Business DailyFinancial News Londonrealtor.comMansion GlobalDow Jones Smart MoneyIntraday Data provided by FACTSET and subject to terms of use. Historical and current end-of-day data provided by FACTSET. All quotes are in local exchange time. Real-time last sale data for U.S. stock quotes reflect trades reported through Nasdaq only. Intraday data delayed at least 15 minutes or per exchange requirements.