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* Trump calls on U.S. companies to exit China
* China unveils retaliatory tariffs on U.S. goods
* Powell says will “act as appropriate” to support growth
* All 3 major U.S. stock indexes post 4th straight weekly declines
* Indexes down: Dow 2.37%, S&P 2.59%, Nasdaq 3% (Updates to market close)
By Stephen Culp
NEW YORK, Aug 23 (Reuters) - Wall Street tumbled on Friday after the U.S.-China trade war escalated in dramatic fashion, with President Donald Trump demanding that American companies seek alternatives to doing business with China after Beijing announced its own slate of retaliatory measures.
All three major U.S. stock indexes ended the session sharply lower, posting their fourth consecutive weekly declines.
The latest exchanges in the long-running tariff row triggered a broad-based sell-off that hit shares of companies with high exposure to China the hardest, such as chipmakers and other top technology names. Dow Jones Industrials components Intel Corp and Apple Inc dropped 3.9% and 4.6%, respectively.
The developments overshadowed a highly anticipated speech from U.S. Federal Reserve Chair Jerome Powell, in which he reiterated a pledge the central bank would “act as appropriate” to support the economy, but he stopped short of committing to the series of rapid-fire rate cuts Trump has been demanding.
Trump’s tweeted response to the speech labeled Powell an “enemy.”
“(Trump) seems to be irate that China reacted to what the U.S. has done and is basically having a mini-tantrum and is angry at everybody,” said David Katz, chief investment officer at Matrix Asset Advisors in New York. “He’s angry at China, he’s trying to put the blame on the market and the economy on Powell.”
“But at this point, it’s very clear ... that the issues that have been coming to fruition of late with the economy and the slowdown are all trade-related and have very little to do with the Fed,” Katz added.
Bernard Baumohl, managing director and chief global economist at the Economic Outlook Group in Princeton, agreed.
“The biggest folly is the belief that lowering interest rates by 25 or 50 bp will do anything to revive the economy,” Baumohl said. “Don’t ask the Federal Reserve to bail out the economy, because they’re not going to be able to do it this time.”
The escalating U.S.-China trade dispute has emerged as a major tripping point for the market in recent weeks. Friday marked the third decline of more than 2% for the S&P 500 so far in August, and the benchmark index has now shed 5.8% in the last four weeks.
Yields for 2-year and 10-year U.S. Treasuries entered inversion territory, a classic recessionary red flag. The curve has traded in and out of inversion for the past three days.
The Dow Jones Industrial Average fell 623.34 points, or 2.37%, to 25,628.9, the S&P 500 lost 75.84 points, or 2.59%, to 2,847.11 and the Nasdaq Composite dropped 239.62 points, or 3%, to 7,751.77.
All 11 major sectors in the S&P 500 ended the session in negative territory. Energy and technology were the biggest percentage losers, both sliding more than 3%.
Trade-sensitive chipmakers dropped on the bellicose trade rhetoric, with the Philadelphia SE Semiconductor index dipping 4.4%.
Specialty retailer Foot Locker Inc plummeted 18.9% on the heels of disappointing second-quarter results.
Computer hardware company HP Inc announced the departure of chief executive officer Dion Weisler and forecast lower-than-expected fourth quarter profit, sending its shares down 5.9%.
Declining issues outnumbered advancing ones on the NYSE by a 4.52-to-1 ratio; on Nasdaq, a 5.27-to-1 ratio favored decliners.
The S&P 500 posted 33 new 52-week highs and 38 new lows; the Nasdaq Composite recorded 38 new highs and 195 new lows.
Volume on U.S. exchanges was 8.07 billion shares, compared with the 7.58 billion average over the last 20 trading days.
Reporting by Stephen Culp; additional reporting by Lewis Krauskopf; editing by Chris Reese