FEARS are growing for some of the world's biggest investment banks, as experts warn mayhem could soon rip through markets over the coming weeks.
Trading revenues at global investment firms dropped by as much as 56 per cent at the start of this year with Europe's firms among the worst affected, according to analysts.
Credit Suisse, Deutsche Bank, UBS and Barclays have suffered an average collapse in revenues of 24 per cent, according to analysts polled by the Financial Times.
The slowdown could dent profits and lead to another round of job losses.
At the same time, one of the world's top investment firms has warned that it has been "too quiet on markets" in recent weeks.
Blackrock said the current calm is "unusual" and looks "unsustainable."
The firm has warned clients to prepare for higher volatility, fuelling fears that stocks are about to suffer another devastating crash.
Richard Turnill, BlackRock's global chief investment strategist, said: "It's been too quiet out there."
And added: "Low volatility and inflation expectations look unsustainable."
It comes after stock markets across the world saw billions of pounds of losses at the start of the year sparked by China's slowing growth and low oil prices.
There were also concerns over the funding of some of Europe's bigger banks including Deutsche Bank, Societe Generale and Commerzbank.
Mr Turnhill said Europe's issues with terrorism and migration could trigger the next period of crashes, as well as another bout of worries over China's economy.
The investment expert also warned that central banks' actions are also an unknown risk.
He said: "The future path of monetary policy remains uncertain and tail risks remain."
Mr Turnhill advised investors to prepare portfolios for future storms.