US CPI Surges in March, as War Sends Gas Prices Higher

Summary

• US CPI surged 0.9% in March, with year-over-year inflation jumping to 3.3% from 2.4% in February, driven primarily by energy prices.
• Energy index rose 10.9% month-over-month, the largest increase since 2005, with gasoline prices up 21.2%, accounting for three-quarters of the CPI rise.
• Core CPI increased 0.2%, lower than anticipated, but shelter costs (owners equivalent rent and rent) rose 0.3% after months of slower increases, posing a risk for sustained core inflation.
• Equity markets saw a relief rally with S&P 500 and NASDAQ futures spiking, and bond yields eased slightly, but caution persists due to geopolitical risks from ongoing talks in Islamabad.
• The war with Iran is expected to continue affecting energy prices in April, with potential spillover to food prices due to fertilizer shortages and higher costs.
• New car prices rose 0.1%, used car prices fell 0.4% contrary to expectations, and apparel prices increased 1.0%, possibly due to tariff impacts.
• Key uncertainty is whether inflation or growth is the bigger threat, complicating the Fed's ability to separate transient war effects from underlying inflation trends.
• Market implication: temporary optimism but underlying risks make aggressive risk-taking premature, with the base case for geopolitical talks being merely a meeting without resolution.
• Narrow observation: shelter cost acceleration after a string of slower rises could hinder long-term decline in core rates, even if energy-driven inflation is temporary.