The wider the credit spread, the more the market is charging for the issuer's default risk. Spreads widen when credit conditions deteriorate (risk-off) and narrow when confidence improves. They are a key barometer of credit-market health.
Formula
Credit Spread = Corporate Bond Yield − Government Bond Yield (same maturity)
Example
If a corporate bond yields 9% and a same-maturity G-Sec yields 7%, the credit spread is 2% (200 basis points).
Relevant NISM series
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