Calling Bullshit on Banking and "Maturity Transformation"

Ashwin Parmeshwaram elaborates on something that I have long suspected, viz., the conventional wisdom on "Maturity Transformation" is basically bullshit . First, a definition Why do banks exist? The conventional wisdom goes like this – depositors prefer to hold liquid risk-free assets and borrowers prefer to borrow for the long-term to invest in risky projects. Banks sit in the middle of this process and perform a sort of alchemy. By performing this alchemy, banks leave themselves open to the risk of bank runs – if all the depositors seek to withdraw their money at the same time, even a bank with otherwise sound loans as assets can go bust. This perceived risk of a bank run is why governments and central banks provide deposit insurance and liquidity facilities to the banking sector, a privilege that is not typically available to other financial intermediaries. In other words, banks exist for the purpose of maturity transformation. Sounds nice and nifty, right? Bu...