Shadow Banking
What is Shadow Banking?
Shadow banking is credit intermediation outside regulated banks, by firms that borrow short and lend long without deposit insurance or a central bank backstop.
Money market funds, repo lenders, securitization vehicles and finance companies do what banks do, funding long-lived assets with short-term claims that investors treat as money-like. That is maturity and liquidity transformation, and it earns a spread for the same reason banking does. The difference from a chartered bank is not the activity but what stands behind it, since this short-term funding carries no insurance and these firms cannot borrow at the discount window. So when lenders refuse to roll over a repo or investors redeem in bulk, the firm has to sell assets into a falling market, and those sales push prices down for everyone holding the same paper. That fire-sale channel is how trouble at a non-bank spreads to the banks and funds holding the same securities.
Shadow Banking: a worked example
A money market fund holds $10 billion of short-term corporate paper and lets investors redeem shares at $1 each on demand. Investors ask for $2 billion back in one week, and the paper can only be sold quickly at 97 cents on the dollar, so the fund must sell 2 ÷ 0.97, or about $2.06 billion of face value, to raise the cash. That leaves roughly $7.94 billion of assets against 8 billion remaining shares, or about 99.2 cents of value per share. Every remaining investor now has a reason to redeem before the value slips further, which is the first-come logic of a bank run inside a firm that takes no deposits.
The mistake students make with shadow banking
The name makes students assume shadow banking is illegal, offshore or hidden. These are ordinary firms that file public reports, money market funds and finance companies among them, supervised under securities rules rather than banking rules. Shadow refers to operating outside bank regulation and outside the deposit insurance and lender-of-last-resort safety net. The danger is a maturity mismatch with no backstop, not fraud.
Shadow Banking questions
Is shadow banking illegal?
No, shadow banking is legal and largely public, and the term refers to credit intermediation by firms that are not deposit-taking banks and so fall under different rules. Money market funds, finance companies and securitization vehicles are registered entities that publish financial statements.
Why can shadow banks suffer runs?
Shadow banks can suffer runs because they fund long-term assets with short-term claims that lenders can pull at will, the same mismatch that exposes banks. Since those claims carry no deposit insurance and the firms have no central bank facility to borrow from, the incentive to get out first is even stronger than at an insured bank.
What counts as shadow banking?
Shadow banking covers money market funds, repurchase agreement lenders, securitization vehicles, finance companies and similar non-bank lenders that create credit outside a banking charter. The test is function rather than label, so any firm that borrows short, lends long and issues claims people treat as cash-like is doing bank work.
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