ETFs in the US had inflows of around $25.4bn in September with funds tracking US stocks gathering the most assets, according to Morningstar.
The US central bank has decided not to take further action to rejuvenate the country's economy but hinted it may do more later if needed.
The recent US downturn, which officially ended in June 2009, has been the longest since the great Depression beginning with the Wall Street crash in 1929.
AdvisorShares has filed with the Securities and Exchange Commission to launch a fund of funds style ETF investing in both long and short positions.
Direxion has filed with the Securities and Exchange Commission for a range of four leveraged ETFs tracking the US market and semiconductor sector.
Two Bear Stearns hedge fund managers have been found not guilty of fraud.
Sometimes a number of factors come together unexpectedly which provide an opportunity to re-think procedures that have been applied for a long period of time.