Rising US debt could chip away at the dollar's dominance, Blackstone boss Stephen Schwarzman warns

• The dollar and US stocks could come under threat if the government doesn't "keep some discipline" on debt, according to Blackstone's CEO.
• "When there's a crisis in the world, they buy our securities – now that doesn't last forever," Stephen Schwarzman said.
• His warning comes after Fitch slashed the US’s credit rating last week.

Rising debt could erode the long-term dominance of both the US dollar and American stocks, Blackstone's CEO has warned.