For the first time since the end of April, investors pulled more money out of exchange-traded funds and exchange-traded notes than they put in, resulting in a net outflow of $238 million for the month, according to statistics released Monday by the National Stock Exchange, an all-electronic stock exchange.

In contrast, ETFs and ETNs posted net inflows of $23.7 billion in October, according to the exchange. For the year, cash flows were positive with an inflow of $101.4 billion. The same time period last year saw a cash inflow of $99.7 billion.

Assets in U.S.-listed ETFs and ETNs reached $1.06 trillion at the end of November, down slightly from $1.08 trillion the previous month. In a year-over-year comparison, assets were up 12% from $947.03 billion at the end of November 2010.

The bulk of the assets were in U.S. equity funds, which totaled $498.39 billion at the end of November, followed by international funds, which had $238.82 billion. Assets in fixed-income funds and commodity funds were $177.18 billion and $120.31 billion, respectively, both up slightly from the October. 

The monthly statistics include shares of open-end exchange-traded products, encompassing U.S. listed shares of investment companies, grantor trusts, ETNs and commodity pools. For the full NSX report, click here.

Margarida Correia writes for Bank Investment Consultant.