Formula & Calculation Mechanism
Fed Chair Powell closely monitors this index to ensure long-term inflation expectations remain firmly anchored near 2.5%-3.0%.
Market Impact on US Equities & S&P 500
Unanchored inflation expectations (>3.3%) force hawkish Fed policy interest rate stances.
Historical Precedents & Bull/Bear Regimes
Remained anchored near 3.0% during 2022-2024 inflation cycle.