Stock-market selloff may mean another 20% drop for S&P 500, says Wall Street veteran

The market veteran also said inflation is not going to come down as much as expected and the interest rates are going to continue to climb higher. 

“Both interest rates and inflation rates will settle down between 4% and 5%, and we are going to go into a stagflation in the economy,” Peterffy told CNBC’s “Squawk Box” on Wednesday. 

The Tell: Why stock market investors should wait for the 10-year Treasury to ‘blink’

The consumer-price index increased 0.4% in September, higher than the 0.3% consensus forecast polled by Dow Jones. Excluding volatile food and energy prices, the core CPI is even more worrisome, jumping a sharp 0.6% against the estimate of a 0.4% increase. 

See: Financial markets still underestimate inflation risks despite seven straight 8%-plus annual CPI readings, according to Deutsche Bank

In this way, the buy and hold strategy is not going to be “rewarding”, he said.

“People better roll up their sleeves and begin to research and try to identify companies with great business prospects and good management, ” said Peterffy. “That is not going to be so simple.” 

Interactive Brokers
IBKR,
+5.44%
reported its third quarter adjusted earnings which surpassed consensus EPS estimates. The electronic broker reported adjusted earnings of $1.08 per share, compared to FactSet’s estimate of 96 cents, while the adjusted came in at $847 million, compared to the consensus of $797 million. 

U.S. stocks traded mixed in choppy session on Wednesday with the S&P 500 losing 0.2%, while the Dow was up 0.1% and the Nasdaq Composite
COMP,
-9.49%
declined 0.3%.

Read: It’s the 35th anniversary of the 1987 stock-market crash: What investors can learn from ‘Black Monday’