Inflation Just Hit a 3-Year High. The Last Time the CPI Spiked Like This, Stocks Did Something Most Investors Forgot

• Core PCE inflation also hit a 12-month high at 129.28 in March, with both measures in the 90.9th percentile of their respective 12-month ranges, signaling broad-based inflationary pressure
• Current conditions differ from 2021-2022: the Fed funds rate sits at 3.75% (already restrictive) versus near-zero in 2021, unemployment is moderate at 4.3%, and the VIX has retreated to 18.38 after spiking to 31.05 in March
• During the 2021-2022 inflation surge, the S&P 500 went from $368.79 to $382.43 over two years, while from October 2021 to September 2023 it posted a negative 1.56% return, effectively treading water through the worst inflation episode in a generation

Market Summary: Inflation Hits 3-Year High

Key Data Points

The Bureau of Labor Statistics reported the headline CPI index reached 332.4 in April 2026, marking a 0.6% monthly increase and the highest level in approximately three years. The reading sits in the 90.9th percentile of the past 12 months. Core PCE hit 129.28 in March, also at the 90.9th percentile of its range.

Market Context

Despite the inflation spike, the S&P 500 has surged 26% over the past year and gained 8.6% in the last month alone. Current market indices show mixed performance: S&P 500 down 0.19%, Dow Jones up 0.10%, Nasdaq 100 down 0.87%, and Russell 2000 down 1.06%.

Historical Precedent

The article draws parallels to the 2021-2022 inflation surge, the only comparable recent episode. During that period, the S&P 500 ETF (SPY) delivered just 3.7% total return over two years (January 2021 to December 2022). From October 2021 through September 2023, SPY posted a negative 1.56% return, essentially moving sideways despite nominal earnings growth.

Current Conditions vs. 2021-2022

Key differences include:

• Fed funds rate currently at 3.75% (down 75 basis points from 4.5% in September 2025), versus near-zero in 2021
• Unemployment at 4.3%, healthier than sub-4% levels that sparked wage-price spiral concerns
• 10-year Treasury yield at 4.38%, below the May 2025 peak of 4.58%
• VIX at 18.38, within normal range after spiking to 31.05 in March

Implications

The analysis suggests investors may face another extended sideways market while inflation is digested, similar to the 2021-2022 experience, though the single historical precedent limits predictive confidence.