OBBBA Stimulus Impact: Why Risk Assets Rally Despite "High for Longer"

The "One Big Beautiful Bill Act" (OBBBA) — signed in February 2026 — represents the most significant fiscal injection into the US economy since the 2009 American Recovery and Reinvestment Act. Critically, it operates entirely OUTSIDE the Federal Reserve's monetary policy channel. This distinction is what allows risk assets to rally even while the Fed maintains its "high for longer" rate stance.

The mechanics of fiscal vs monetary stimulus differ fundamentally. Monetary stimulus works through interest rate and reserve channels — it lowers borrowing costs and floods banks with reserves. Fiscal stimulus works through direct income and spending channels — it puts money directly into corporate revenues, household incomes, and infrastructure projects. Risk assets respond to BOTH channels, but the transmission timing differs.

OBBBA's three pillars all directly support equity earnings. The TCJA extension ($720B over 30 months) maintains the 21% corporate tax rate that has been a primary driver of S&P 500 EPS growth since 2018. The infrastructure component ($380B) channels spending into industrials, materials, and construction firms — historically the highest-multiplier sectors for fiscal stimulus. The manufacturing reshoring incentives ($300B) extend the post-COVID supply chain restructuring trade.

The historical parallel is the 2017–2018 TCJA period. Despite the Fed hiking rates 4 times in 2018, the S&P 500 still posted a +21% return for 2017 and dramatic earnings growth into 2018. Fiscal stimulus overpowered monetary tightening for equity multiples — until valuations stretched and the Fed pivoted in late 2018. We expect a similar dynamic now, with risk assets remaining supported through 2026 even if the Fed delays cuts.

The key risk: fiscal stimulus is inflationary at the margin, particularly the manufacturing reshoring component. If services inflation re-accelerates above 3.5% in H2 2026, the Fed could be forced to delay cuts further or even consider another hike. This would compress equity multiples even as earnings stay supported. Investors should hedge this scenario with selective exposure to gold, Bitcoin, and short-duration TIPS.