Ray Dalio came out with a gloomy prediction for stocks and the economy after a hotter-than-expected inflation print rattled financial markets around the globe this week.

“It looks like interest rates will have to rise a lot (toward the higher end of the 4.5 per cent to 6 per cent range),” the billionaire founder of Bridgewater Associates LP wrote in a LinkedIn article dated Tuesday. “This will bring private sector credit growth down, which will bring private sector spending and, hence, the economy down with it.” 

A mere increase in rates to about 4.5 per cent would lead to a plunge of around 20 per cent in equity prices based on the present value discount effect, he said. On top of that he estimates a 10 per cent negative impact from declining incomes.

The rate market suggests traders have fully priced in a 75-basis-point hike next week by the Federal Reserve, with a slight chance for a full percentage point move. Traders expect the Fed fund rate to peak at close to 4.5 per cent next year, from the current range of 2.25 per cent and 2.5 per cent. 

Dalio noted investors may still be too complacent about long-term inflation. While the bond market suggests traders are expecting an average annual inflation rate of 2.6 per cent over the next decade, his “guesstimate” is that the increase will be around 4.5 per cent to 5 per cent. With economic shocks, it may be even “significantly higher,” he added.  

Dalio said the US yield curve will be “relatively flat” until there is an “unacceptable negative effect” on the economy.

A deepening inversion of key curve measures -- seen by many as a potential harbinger of recession -- has helped reinforce a more downbeat view about economic activity among investors.

Investors, speculating that the Fed will tip the economy into recession next year in the fight to curb inflation, already see policy makers easing rates in the later stages of 2023.

The S&P 500 is heading for its biggest annual loss since 2008, while Treasuries have suffered one of their worst beatings in decades.