MSCI said that it intends to file a registration statement for the sale by Morgan Stanley of approximately half of its 53 million share ownership interest in MSCI.

“The proposed offering is consistent with Morgan Stanley’s previous indication that it might sell a portion of its ownership interest in MSCI and that it may ultimately divest its entire interest in MSCI,” it said.

In a separate release, MSCI announced that operating revenues increased 21.9% to US$108.2 million in the second quarter of 2008 and 21.2% for first half 2008. Adjusted EBITDA increased 43.4% to US$48.0 million in the second quarter. However, net income decreased 6.1% to US$18.6 million.

Henry Fernandez, chairman and CEO, said “Importantly, our adjusted EBITDA margin was 44.3% despite incurring expenses associated with replacing services currently provided by Morgan Stanley. Demand for our investment decision support tools remained strong across our diversified client base, further proof of the strength of our franchise during a difficult market environment. This continued strength is also evident in the 21.4% growth in the run rate on a year-over-year basis and 4.1% on a sequential basis.”