This obscure government data might hold the key to what has been driving big swings in the stock market

Site SearchClearSEARCHAdvanced Search ➔Search ResultsSymbolsNo results foundAll NewsArticlesVideoPodcasts0 ResultsNo Results FoundAuthorsNo results foundSectionsNo results foundColumnsNo results found Market ExtraThis obscure government data might hold the key to what has been driving big swings in the stock marketHedge funds moving money around might be having a bigger impact on the market than many realizePublished: March 27, 2026 at 7:45 a.m. ETShareResizeListen(5 min)Hedge funds might be calling the tune in this market. Photo: MarketWatch photo illustration/iStockphotoOver the past six months, investors have weathered some major swings in the U.S. equity market.

The Big Tech stocks, which had done much of the heavy lifting since the start of the current bull market in late 2022, suddenly appeared to hit a wall. Shares that had been struggling to keep up suddenly leapt ahead. 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.