The accounting treatment of CDS used for hedging may not parallel the economic effects and instead, increase volatility. For example, GAAP generally require that CDS be reported on a mark to market basis. In contrast, assets that are held for investment, such as a commercial loan or bonds, are reported at cost, unless a probable and significant loss is expected. Thus, hedging a commercial loan using a CDS can induce considerable volatility into the income statement and balance sheet as the CDS changes value over its life due to market conditions and due to the tendency for shorter dated CDS to sell at lower prices than longer dated CDS. One can try to account for the CDS as a hedge under FASB 133 but in practice that can prove very difficult unless the risky asset owned by the bank or corporation is exactly the same as the Reference Obligation used for the particular CDS that was bought.