Definition and Basic Mechanics of CDS
A CDS (Credit Default Swap) is a derivative contract that allows the buyer to transfer the default risk of a specific entity (the reference entity) to the seller. The protection buyer pays periodic premiums, and if the reference entity defaults, the protection seller compensates the buyer for the loss. The structure resembles insurance, but unlike insurance, you can buy CDS protection without actually owning the underlying bonds.
For example, an investor holding 100 million yen of Company A's bonds buys CDS protection at an annual premium of 1 million yen (1%). If Company A defaults, the CDS seller compensates the 100 million yen loss. If no default occurs, the investor simply continues paying the 1 million yen annual premium. The CDS premium (spread) reflects the reference entity's creditworthiness - the weaker the credit, the higher the spread.
Reading CDS Spreads and Numerical Examples
CDS spreads are quoted in basis points (bp), where 1 bp = 0.01%. Investment-grade companies typically trade at 30-100 bp (0.3-1.0%), while speculative-grade names trade at 200-500 bp (2-5%). A sharp spike in CDS spreads signals that the market perceives elevated default risk.
Just before Lehman Brothers' collapse in 2008, its CDS spread surged above 700 bp. Japan's sovereign CDS spread normally sits at 20-40 bp but briefly approached 150 bp after the 2011 Great East Japan Earthquake. Because CDS spreads reflect credit risk in real time - faster than rating agency actions - they are closely watched by market participants.
Role in the Financial Crisis and Common Misconceptions
CDS were branded 'financial weapons of mass destruction' during the 2008 crisis. AIG had sold massive amounts of CDS protection on mortgage-backed securities (MBS) and suffered roughly $85 billion in losses when subprime mortgages collapsed. At the time, the CDS market's notional outstanding had ballooned to about $60 trillion - several times the size of the actual bond market. Nonfiction accounts let you relive the behind-the-scenes drama of the financial crisis
A common misconception is that CDS caused the financial crisis. CDS are fundamentally risk management tools; the real problems were the underestimation of risk and inadequate regulation. Post-crisis reforms mandated central clearing through CCPs and greatly improved market transparency. Today, the CDS market's notional outstanding has shrunk to roughly $10 trillion, reflecting a healthier market structure.