Banks and mark to market

Here we (finally) have a defense of mark-to-market accounting - in The Economist.

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Standard-setters should defuse the argument by making clear that their job is not to regulate banks but to force them to reveal information. The banks, their capital-adequacy regulators and politicians seem to dream of a single, grown-up version of the truth, which enhances financial stability. Investors and accountants, however, think all valuations are subjective, doubt managers’ motives and judge that market prices are the least-bad option. They are right. A bank’s solvency is a matter of judgment for its regulators and for investors, not whatever a piece of paper signed by its auditors says it is. Accounts can inform that decision, but not make it.