The 10-Year Treasury yield has risen from 3.97% to 4.32-4.34%1, forcing a broad repricing of growth equity valuations. The move is not marginal — it shifts the discount rate applied to future earnings across every sector.
High-PEG stocks bear the heaviest burden. When yields rise, the present value of distant cash flows falls sharply. Companies priced on earnings years out suffer the most. This is not theory — it showed up directly in May 12 trading.
Lightspeed Commerce (LSPD) dropped 5.58%1 on a day the broader market gained. Autodesk fell 3.45%1 in the same session. CI&T has underperformed the S&P 500 year-to-date1. None of these declines followed negative company-specific news — the pressure came from the rate environment.
The PEG ratio (price-to-earnings divided by growth rate) measures how much investors pay per unit of future growth. DKS carries a PEG of 3.21 and Booz Allen Hamilton (BAH) sits at 4.451 — both well above industry norms. At 3.97% yields, those multiples were defensible. At 4.34%, the math changes.
The 10-Year Constant Maturity Rate moved from 4.29 to 4.34%1, confirming the yield pressure is broad and sustained, not a single-day spike. Markets are recalibrating the risk-free rate assumption embedded in every discounted cash flow model.
The pattern divides markets cleanly. Value stocks with near-term earnings and low PEG ratios are relatively insulated. Growth stocks — especially in software and AI infrastructure — see their valuation cushion erode with each basis point move higher.
Investors holding high-PEG positions face a structural headwind until yields stabilize or reverse. A threshold around 4.3% appears to accelerate the divergence between rate-sensitive growth names and the broader index. That threshold has now been crossed.
Portfolio construction that ignores duration risk in equity positions — not just bond positions — is the central mistake of this rate environment.
