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'<br>By Lewis Krauskopf, Devik Jain and Sruthi Shankar<br> <br>June 23 (Reuters) - Wall Street's main indexes were mixed in choppy trading on Thursday, as gains in defensive shares countered declines for economically sensitive groups amid growing worries about a recession.<br> <br>The benchmark S&amp;P 500 edged lower as investors weighed whether the Federal Reserve's aggressive rate hikes to control surging inflation would wound the economy.<br><br>Benchmark U.S. Treasury yields fell to two-week lows, supporting tech and other growth stocks and keeping the Nasdaq in positive territory.<br> <br>Trading has remained volatile in the wake of the S&amp;P 500 last week logging its biggest weekly percentage drop since March 2020.<br>Investors are weighing how far stocks could fall after the index earlier this month fell over 20% from its January all-time high, confirming the common definition of a bear market.<br> <br>"It´s just like we have seen over the last few months, anytime we get a little bit of a rally from the bottom, it doesn´t seem to last very long," said James Ragan, director of wealth management research at D.A.<br><br>Davidson.<br> <br>The Dow Jones Industrial Average fell 108.55 points, or 0.36%, to 30,374.58, the S&amp;P 500 lost 4.64 points, or 0.12%, to 3,755.25 and the Nasdaq Composite added 31.14 points, or 0.28%, to 11,084.22.<br> <br>In his second day of testifying before Congress, U.S.<br>central bank chief Jerome Powell said the Fed's commitment to reining in 40-year-high inflation is "unconditional" but also comes with the risk of higher unemployment.<br> <br>U.S. business activity slowed considerably in June as high inflation and declining consumer confidence dampened demand across the board, a survey on Thursday showed.<br> <br>"The Fed wants to see things start to slow and the data is starting to reflect that," Ragan said.<br> <br>Meanwhile, Citigroup analysts are forecasting a near 50% probability of a global recession.<br> <br>Among S&amp;P 500 sectors, energy slumped 4.5%, continuing its recent pullback after soundly outperforming the market for most of 2022.<br><br>Declines in Exxon Mobil and Chevron were among the biggest individual weights on the S&amp;P 500.<br> <br>Other economically sensitive sectors also fell, with materials down 2.2% and financials and industrials off 1.9% and 1.6%, respectively.<br> <br>Defensive groups considered safer bets in rocky economic times were the top-performing sectors.<br><br>Among those groups, utilities, consumer staples and healthcare all rose over 1%.<br> <br>Gains of about 1% each in tech heavyweights Microsoft and [http://www.4mark.net/story/3560533/private-investigation-international-professional-private-detective-investigation-services-private-investigation-international-professional-private-detective-investigation-services-international-private-investigation-agency Apple] also helped support the S&amp;P 500.<br> <br>Declining issues outnumbered advancing ones on the NYSE by a 1.13-to-1 ratio; on Nasdaq, a 1.07-to-1 ratio favored advancers.<br> <br>The S&amp;P 500 posted one new 52-week high and 40 new lows; the Nasdaq Composite recorded 28 new highs and 166 new lows.<br><br>(Reporting by Lewis Krauskopf in New York, Devik Jain and [https://www.business-opportunities.biz/?s=Sruthi%20Shankar Sruthi Shankar] in Bengaluru and Boleslaw Lasocki in Gdansk; Editing by Arun Koyyur and Cynthia Osterman)<br>'