Case Study: The 2008 Global Financial Crisis
The 2008 crisis is the capstone episode in which almost every fragility in money and banking surfaced at once. A long credit boom in mortgages and a housing bubble that peaked in 2006 gave way to a bust as subprime delinquencies climbed through 2007. Highly leveraged shadow banks funded long-dated mortgage assets with short-term wholesale funding, so when asymmetric information about who held the losses spiked, that funding ran. The collapse of Lehman Brothers on 15 September 2008 turned a slump into a global panic, met by too-big-to-fail rescues such as the $85 billion loan to AIG, the Fed acting as lender of last resort through emergency facilities, the $700 billion TARP programme, and the first round of quantitative easing.
Why it matters
The lesson is that the crisis was not one failure but a chain. Cheap credit and rising house prices encouraged leverage, leverage made balance sheets fragile, opacity in mortgage-backed securities meant nobody could tell solvent firms from insolvent ones, and that uncertainty turned an ordinary downturn into a run on the whole funding system. Each concept in the course shows up as one link in that chain.
Worked examples
A money-market lender refuses to roll over the overnight repo it had been lending to an investment bank against mortgage collateral. Which course concept explains the freeze, and why did it spread to healthy firms too?
This is a run on wholesale funding driven by asymmetric information. Once it became unclear which firms were sitting on subprime losses, lenders could not separate the solvent from the insolvent, so they pulled back from everyone. The shadow-banking system had no deposit insurance and no automatic lender of last resort, so the run had nothing to stop it until the Fed stepped in.
Explain why the government rescued AIG and large banks in 2008 even though bailouts reward bad decisions.
These firms were judged too big to fail, meaning their collapse would have cascaded through counterparties and frozen credit for the whole economy. Policymakers accepted the moral hazard cost of rescue to avoid systemic collapse. The $85 billion AIG loan and the $700 billion TARP capital injections were the price of containing contagion, which is exactly the trade-off the too-big-to-fail problem describes.
Common mistakes
- ✗The crisis was caused only by greedy subprime borrowers. Borrower behaviour mattered, but the deeper drivers were a leveraged credit boom, opaque securitisation, and shadow-bank funding fragility that turned losses into a system-wide run.
- ✗Lehman’s failure was the cause of the crisis. The housing bust and subprime losses were already underway through 2007 and early 2008. Lehman’s bankruptcy was the trigger that escalated an existing crisis into a global panic, not its origin.
- ✗TARP cost taxpayers $700 billion. That figure was the authorised ceiling (later cut by Dodd-Frank), not the amount lost. Much less was actually disbursed, the bank investments were largely repaid with interest, and the realised net cost ended up far below the headline, though not zero once housing and auto support are counted.
Revision bullets
- •Sequence: mortgage credit boom and housing bubble (peak 2006), subprime bust through 2007, then global panic after Lehman on 15 September 2008
- •Shadow-bank leverage plus a run on short-term wholesale funding, amplified by asymmetric information about who held the losses
- •Policy response: too-big-to-fail rescues, the Fed as lender of last resort, $700 billion TARP, and the first quantitative easing in late 2008
Quick check
Which single event is best described as the trigger that turned the ongoing 2007 to 2008 stress into a full global panic?
Why did the 2008 run hit the shadow-banking system so hard relative to traditional commercial banks?
Connected topics
Sources
- Mishkin (2018), Ch. 12Mishkin, F. S. The Economics of Money, Banking, and Financial Markets. 12th ed. Pearson, 2018. ISBN 978-1-292-26885-9.Financial crises in advanced economies, with the 2007-2009 crisis as the central case: credit boom, housing bubble, shadow-bank fragility, and the policy response.
- Federal Reserve History: Subprime CrisisFederal Reserve History. The Subprime Mortgage Crisis. Federal Reserve Bank of Richmond. federalreservehistory.org/essays/subprime-mortgage-crisisOfficial central-bank account of the housing-bubble-to-panic sequence, the failures of 2008, and the Federal Reserve’s emergency facilities and asset purchases.