Donald Trump posted to social media more than 100 times on Monday in a frenzy of self-aggrandizing messages even as the global stock market fell sharply amid fears that his economic policies could produce a US recession.

Far from rushing to calm troubled waters after markets reacted shakily to his refusal to rule out a recession, the US president instead shared a blizzard of links on Truth Social, the platform he owns, starting at 11.44am ET with a link to a Fox News article about Keir Starmer, the British prime minister, raising defense spending before visiting Washington last month.

After US markets closed – with the S&P down 2.7%, the Dow Jones down 2%, the Nasdaq down 4%, and shares in Elon Musk’s Tesla seeing their worst day since late 2020, falling 15 points – Trump’s account was posting ads for The Apprentice, the 2000s reality show that rescued him from financial oblivion and set him out on the road to political power.