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Global stocks plummeted Wednesday and bonds surged slightly as investors worried about the global economy, with disappointing data releases weighing down financial markets.

The MSCI World stock index plunged 0.31% Wednesday morning. US futures dipped after stocks fell dramatically on Tuesday following the release of data showing consumer confidence fell to a 16-month low in June.

S&P 500 futures fell 0.15% as of 5.35 a.m. ET, Dow Jones futures were broadly unchanged, and Nasdaq 100 futures were 0.24% lower.

European stocks were in the red Wednesday, with the continent-wide Stoxx 600 1.09% lower and London's FTSE 100 index down 0.51%.

Asian stocks fell overnight, with China's CSI 300 dropping 1.54% and Tokyo's Nikkei 225 losing 0.91%.

Global stocks have dropped significantly this year as inflation soared around the world, pushing central banks to cut back on their support for economies by hiking interest rates and ending their huge bond-buying programs.

Worries about growth have returned to the forefront of investors' minds after data on Tuesday showed that consumer confidence in both the US and Europe has deteriorated sharply.

"It's been another volatile 24 hours in markets, with a succession of weak data releases raising further questions about how close the US and Europe might be to a recession," Jim Reid of Deutsche Bank said.

The S&P 500 stock index slipped 2.01% Tuesday, bringing its rebound from recent lows to an end.

Global bond prices recovered slightly Wednesday as investors moved into the safe-haven assets. The yield on the key 10-year US Treasury note, which moves inversely to the price, fell just under a basis point to 3.171%.

Federal Reserve Chair Jerome Powell, European Central Bank President Christine Lagarde, and Bank of England Governor Andrew Bailey are all due to speak at an ECB event in Portugal later Wednesday, which will be closely watched by traders.

"With the consumer being central to US economic growth, the recent raft of pessimistic readings has led to some concerns that sentiment could become self-fulfilling as consumers hunker down in the face of higher prices, especially fuel and food," Richard Hunter, head of markets at trading platform Interactive Investor, said.

"The Federal Reserve will of course be aware of the deteriorating sentiment, but for the moment is showing no signs of abandoning its primary objective of battling inflation head-on."

The dollar index was also roughly flat at 104.51. Meanwhile, bitcoin fell below $20,000 before it slightly recovered above that milestone.