In a “noteworthy sign of returning liquidity to capital markets,” a report from Moody’s highlights a drop in Level 3 assets (L3) at the biggest American investment banks in 2009.

These assets cannot be valued easily because they are generally illiquid. Many of the credit boom’s newfangled financial instruments—subprime-linked securities, collateralised debt obligations and the like—were classified as L3 and marked to internal models when reporting their values on balance sheets. Subsequent write-downs of these assets called into question the judgment and competence of bank executives.

In general, creditors now prefer banks to hold less L3, with outright disposals preferable to transfers into the Level 2 or 1 categories. As a percentage of tangible common equity, cash L3 at five lenders with large investment-banking operations fell sharply in 2009; “good news for creditors,” according to Moody’s. (L3 derivative positions were excluded from the analysis due to inconsistent disclosure practices.)

Despite the decline as a share of equity, the absolute value of L3 at Bank of America and JPMorgan remained relatively flat in 2009. Bank of America reported the largest increase in value of L3 (US$9.4bn) in the sample, while JPMorgan was the only bank to disclose a net transfer into the L3 category. Morgan Stanley reported the largest absolute decline in L3, trimming its balance by some 38% during the year, largely through disposals.