The U.S. Financial Accounting Standards Board Rule 157, which is effective for fiscal years that begin after November 15, 2007, will make it harder for companies to avoid putting market prices on securities considered hardest to value, known as Level 3 assets, the wire service reported.

Janjuah noted that, for example, Morgan Stanley has the equivalent of 251 percent of its equity in Level 3 assets, Goldman Sachs has 185 percent, Lehman Brothers has 159 percent and Citigroup has 105 percent, according to Bloomberg.

On the other hand, Merrill Lynch has Level 3 assets equal to 38 percent of its equity. As a result, Janjuah believes Merrill ''may well come out of all of this in the best health.''

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