The same day the Russell 2000 fell more than a percentage point more than the S&P 500 and Treasury yields hit fresh highs, high-yield credit spreads stayed parked near cycle lows.
On September 9, the S&P 500 fell 0.48% to 7,636.36, the Dow dropped 0.77% to 52,380.66, and the Nasdaq declined 0.64% to 26,253.34. The Russell 2000 underperformed sharply, falling between 1.30% and 1.36% to 2,919.86, a small-cap gap that is often read as a growth-scare signal. The same day, the 10-year and 2-year Treasury yields both hit 52-week highs, near 4.84% to 4.85% and 4.427% respectively. The VIX rose to 16.44, up 4.58% on the day, though still at a level generally considered low-stress.
High-yield credit, measured by the ICE BofA US high-yield option-adjusted spread, held near 2.65% to 2.67% as of the most recent reading available, close to cycle lows. That reading is dated to September 8, one day before the equity and rate moves described above, a lag disclosed here rather than treated as same-day confirmation.
The gap is the story. If credit markets genuinely believed the equity selloff and small-cap underperformance reflected a real growth or credit-quality concern, spreads would typically be widening alongside it. They aren't, at least as of the last available reading. That leaves two readings open: credit investors may simply have better information that this is an oil-driven, transitory shock rather than a structural one, or credit spreads may be a slower-moving market that hasn't yet caught up to what equities and rates are already pricing.
Neither has been confirmed. What is measurable is the divergence itself, and that a same-day high-yield reading, rather than the one-day-lagged figure available here, would be the single most useful next data point for resolving which reading is correct.