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Simulationary Monetary Policy

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Asymmetry in the credit markets result in a wedge between the costs of external funds (i.e. from banks and other lenders) to the public, and the cost of internal funds. Thus, internal funds, bank loans and other sources of financing are imperfect substitutes for firms. These imperfections related to credit market frictions causes monetary policy changes to affect both the bank-lending channel and the balance sheet channel \citep{Gertler1995}.

The bank-lending channel underpins the role of banks as financial intermediaries, as their business structure is designed to serve certain type of borrowers, being small to mid-sized enterprises and households, where the problem of asymmetric information emerge \citep{stiglitz81}. According to the theory, …show more content…

When the net worth of an agent falls, adverse selection and moral hazard problems increase in credit markets \citep{Boivin2010}. More specifically, contractionary monetary policy decreases the net worth of agents and firms, implying less collateral for the loans, and, consequently, increased losses due to the adverse selection. This again tends to cause more reluctant lenders, evident by their demand for higher risk premium or reducing the volume lent out, causing a decline in spending and aggregate demand (\citet{BernankeGertler89}; \citet{bernanke1999}). Beyond this asymmetric information problem, the lower net worth of firms devalue owners’ equity stake in their firms implying increased risk appetite. Again, this causes a decrease in the loan supply and thus a decrease in aggregate output. Furthermore, increased interest rates transmits into higher debt burden for loans with floating interest rates. The increase in interest rates suggests that the cash flow of firms and households weakens, leading to decreasing investments and …show more content…

The risk-taking channel is thought to operate via three main mechanisms. First, the search-for-yield mechanism, with low (nominal) interest rates increasing incentives for banks to take on more risk \citep{Rajan2005}. The second mechanism relates to the impact of low interest rates on real valuations, incomes, and cash flows. Low rates boost asset and collateral values while tending to reduce price volatility, which in turn downsizes the banks estimated probability of default, implying the belief that the increase in asset values are sustainable, encouraging both borrowers and banks to accept higher risk positions \citep{Borio2012}. Third, monetary policy also affects risk-taking through the reaction function of the central bank to negative shocks. The commitment of a central bank for lower (future) interest rates in the case of a threatening shock reduces the probability of large downside risks, thereby encouraging banks to assume greater risk.\footnote{This effect, also known as the Greenspan or Bernanke put, operates through the \textit{expected} lower interest rates rather than \textit{current} low rates themselves. Its magnitude, however, depends on the current level of the policy rate. Anticipated interest rate reductions tend to correspond to a higher risk position when there is

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