The shadow banking industry has grown to about $67 trillion, $6 trillion bigger than previously thought, leading global regulators to seek more oversight of financial transactions that fall outside traditional oversight.

The size of the shadow banking system, which includes the activities of money market funds, monoline insurers and off-balance sheet investment vehicles, “can create systemic risks” and “amplify market reactions when market liquidity is scarce,” the Financial Stability Board said in a report, which utilized more data than last year’s probe into the sector.