Storm clouds are forming over the global corporate sector as debt costs rise and earnings dwindle, S&P Global says

• There's trouble brewing for world's corporations, according to S&P Global.
• The firm pointed to slower activity, profits, and demand amid tighter financial conditions.
• Wall Street has issued grim warnings over the outlook for US corporations into next year.

Trouble is brewing in the global corporate sector as borrowing costs rise, and earnings ground to a near-halt, according to S&P Global Market Intelligence.

The firm on Monday pointed to ailing global business activity in recent months, which could point to "storm clouds" on the horizon for companies.