Credit Spread
A Credit Spread is the difference in yield between a corporate bond (or any non-sovereign debt instrument) and a risk-free government security of comparable maturity. It compensates investors for taking on the additional credit, liquidity, and default risk of the non-sovereign issuer relative to the government.
Credit spreads are the pricing mechanism through which bond markets communicate their assessment of an issuer's creditworthiness. When the RBI's benchmark 10-year G-Sec yields 7.0% and a AAA-rated NBFC issues a 10-year bond at 7.6%, the credit spread is 60 basis points (0.60%). This spread is not arbitrary — it encapsulates the market's collective assessment of the NBFC's probability of default, the expected recovery rate in case of default, and the illiquidity premium for holding a bond that trades less actively than the liquid G-Sec.
Credit spreads are not constant — they widen during periods of stress and compress during risk-on environments. The IL&FS default in September 2018 triggered a dramatic widening of NBFC credit spreads: bonds that had traded at spreads of 30–50 basis points over G-Secs suddenly demanded spreads of 100–200 basis points or more as investors fled NBFC paper and a liquidity crunch gripped the sector. Conversely, during the post-COVID recovery of 2021, when the RBI maintained surplus liquidity and rates were at historical lows, credit spreads compressed to unusually tight levels as investors, starved of yield, accepted lower compensation for credit risk.
Credit spreads also differ across rating categories. The spread between AAA-rated corporate bonds and G-Secs is typically narrow — 30 to 80 basis points in normal conditions. AA-rated bonds carry higher spreads, while BBB-rated paper (the lowest investment-grade rating) might price 150–300 basis points above G-Secs. Below investment grade (speculative or junk), spreads can extend to several hundred basis points, reflecting the substantially higher default probability. SEBI's regulations on debt mutual funds categorise credit risk funds as those with minimum 65% exposure to bonds rated below AA, explicitly acknowledging the distinct risk profile of high-spread investing.
For investors evaluating debt mutual fund categories, the credit spread level in the portfolio is a key risk indicator. A fund that consistently shows higher-than-category-average returns during compressed-spread periods is often taking concentrated credit risk that may not be immediately apparent. The realisation of this risk typically comes suddenly — as it did with Franklin Templeton's credit risk funds in 2020, which were wound up after excessive concentration in illiquid, high-spread paper made redemptions impossible during the COVID liquidity crunch.