Stress Tests

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Doctors make patients jog on a treadmill to see if their hearts can withstand stress. Regulators do the same to banks, minus the treadmill. Financial stress tests run lenders through a simulated workout to separate banks that can stay on their feet in a crash from those that can’t: What if interest rates shoot up? What if China’s economy tanks? What if unemployment surges and homes lose a fifth of their value? What if all those things happen at the same time? Vigorous health checks for lenders became a pillar of banking supervision in the wake of the 2008 financial crisis. Some were more successful than others at restoring credibility to the system.

The Situation

After a decade of tougher supervision, stress tests are becoming an easier and more routine affair. In the U.S. Federal Reserve's 2017 exercise, every lender passed for the first time. Regulators working for President Donald Trump suggested in June that the frequency of the tests be cut back to every two years, and that lenders with sufficient capital cushions be dropped out altogether. The tests have helped regulators push banks to build higher loss buffers, improve their monitoring of risks and force comprehensive data collection. In 2016, European regulators stopped delivering pass/fail grades and turned their test into a biennial event instead of annual. Italian lenders were again in the spotlight, as they were in 2014 when 25 out of 130 banks failed in the biggest-ever stress test, which aimed to restore confidence and end a two-year slump in lending that choked off Europe’s economic recovery. The latest European test was criticized for its limited scope — covering just 51 of the region’s biggest banks with none in Portugal or Greece — and for using a situation with rising interest rates, rather than the negative rates that are hurting banks now. 

Sources: U.S. Federal Reserve, European Banking Authority, European Central Bank

The Background

The first public stress test, conducted by the Fed in 2009, was probably the most effective. In the midst of the worst financial collapse since the Great Depression, the Fed flunked 10 out of 19 banks, identifying a capital shortfall of $75 billion. Once this gap was filled, investors were satisfied that there would be no more bad surprises and that the Fed had grasped the scale of the problem. Subsequent U.S. stress tests have failed just a few banks, which then halted dividends and altered their capital planning to suit the regulator. Europe’s turn came in 2010 and 2011 when the sovereign debt crisis piled losses onto lenders that held Greek, Spanish, Italian and Portuguese government bonds. A key question that investors want answered — what would happen if a euro-area country defaulted? — has never been on the test. Two Irish banks passed in 2010 and needed a government bailout later that year. Belgian lender Dexia got a clean bill of health in 2011 and collapsed after a bank run three months later. The European Central Bank, which took over as the supervisor for more than 100 of the largest lenders in the euro area in 2014, made the test tougher, forcing firms to increase provisions for soured loans.

The Argument

When investors suspect that a stress test is too easy, it can create confusion, rattle markets, undermine confidence or even add to worries about which banks might be sick. Regulators fine-tune stress tests to ensure that they are rigorous enough to bolster faith in banks without strangling credit. Banks are opaque companies, and finance is abstract at best, so the worst possible outcome is a test that is neither clear nor credible. Unable to borrow, unable to lend, the banks can become non-functioning zombies. The tests have given bank managers and regulators better tools to monitor the complex lending and trading relationships that bind together the financial system. That’s data they lacked during the 2008 crisis, when dozens of banks were failing around the world. Even though the ECB, the Fed and the Bank of England are seen as independent from their respective governments, political pressure to ease up on supervision and regulation is having an impact. Stress tests are likely to get easier -- or at least not get harder -- in coming years and become just one of many tools to make sure the crisis isn’t repeated.

The Reference Shelf

  • A Q&A explaining Europe's 2016 stress test, and the European Banking Authority's guidelines for the exam.  
  • A report from the Adam Smith Institute criticized the Bank of England's stress tests. 
  • The Fed's statement on its 2016 test. 
  • The Bank of England's 2016 stress test results.
  • Bloomberg QuickTakes on capital requirements and zombie banks.
  • Stress Test,” a 2014 book by former Treasury Secretary Timothy Geithner chronicles the global financial crisis.

    First published Oct. 24, 2014

    To contact the writers of this QuickTake:
    Yalman Onaran in New York at yonaran@bloomberg.net
    John Glover in London at johnglover@bloomberg.net

    To contact the editor responsible for this QuickTake:
    Leah Harrison at lharrison@bloomberg.net

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