Investors examined the latest read on the economy as additional strategists chimed amid with negative views on the market, resulting in the worst weekly fall in US equities since mid-June in tumultuous trading.
The S&P 500 fell 0.8%, bringing its week-to-week loss to 1.7%. Apple was the Dow Jones industrial average's worst loser after a judge ordered the iPhone manufacturer to overhaul the way it generates money from its App Store.
As data on US producer prices reignited discussion about when the Federal Reserve will pull back on stimulus, gold fell for the first time since early August.
Even as central banks reiterate an accommodating policy, markets have been turbulent as the prolonged spread of COVID-19 has undermined the economic recovery and raised supply-shock inflation. In the US, shares have been volatile due to a lack of clarity on the Fed's plan for reducing its asset purchases and conflicting economic data.
Data showed the PPI for final demand, a key gauge of inflation, rose more than expected last month. Almost all of the big Wall Street banks' strategists have sent a cautious warning about the US stock market this week. Valuations at historical extremes, a near nonstop gain for seven months, an economy that appears lackluster, and the coming tapering of Fed stimulus are among the recurrent elements in their analysis.
In Europe, The Stoxx 600 index dipped 0.3% with telecommunications and utilities failing and miners and technology leading the gainers. The European stocks benchmark fell for the second week in a row, the first time since the end of April, as investors hedged against the possibility that central bank stimulus measures would be soon reversed.
On Friday, traders were also concerned about trade tensions with China. As Biden encouraged China’s Pres. Xi to cooperate on a phone conversation, the Biden Administration is considering launching a fresh investigation into Chinese subsidies.
Oil rose, with investors ignoring China's announcement that it had released crude from its strategic reserves.