Brokerage regulators are imposing new restrictions on investing in volatile portfolios known as leveraged exchange-traded funds.
Traditional ETFs track an index such as the Standard & Poor's 500, and, unlike traditional mutual funds, can be traded throughout the day.
Leveraged ETFs seek to deliver multiples of the return generated by an index or benchmark.
The Financial Industry Regulatory Authority said it would boost margin requirements for buying leveraged ETFs starting Dec. 1. The shift would raise the amount investors must deposit with a broker before they can borrow to invest in the products.
