National Stock Exchange, Inc. (NSX) said that assets in U.S. listed Exchange-Traded Funds (ETF) and Exchange-Traded Notes (ETN) have touched a new record of about $1.02 trillion at the end of January 2011.

The latest figure is an increase of about 37 percent over January 2010 month-end when assets totaled $744.7 billion.

At the end of January 2011, the number of listed products totaled 1,121 compared to 947 listed products at the same time last year.

ETF net cash inflows for the month of January totaled over $10.3 billion, with U.S. Equity leading all product categories with more than $10.1 billion in net cash flow. ETF/ETN notional trading volume during January 2011 totaled almost $1.3 trillion, representing 29 percent of all U.S. equity trading volume.

An ETF is an investment fund traded on stock exchanges, much like stocks, whereas an ETN is a senior, unsecured, unsubordinated debt security issued by an underwriting bank.