S&P 500 Posts Fourth Straight Losing Week as Fed Holds, PPI Runs Hot, Oil Surges Past $107, and SMCI Crashes 33%

A week that began with hope ended in capitulation. Monday and Tuesday saw the S&P 500 rally as much as 1.7% from the prior Friday's close, fueled by Treasury Secretary Scott Bessent's confirmation that Iranian oil tankers were still transiting the Strait of Hormuz and Nvidia's stunning $1 trillion backlog announcement at its annual GTC conference. For 48 hours, the market tried to believe the worst was over.

Then Wednesday happened. A scorching-hot Producer Price Index report arrived before the open, followed by a Fed hold and hawkish dot plot that killed what remained of the rate-cut trade. Iran escalated attacks on Gulf energy infrastructure, Brent crude surged past $107, and the week's second half became an unbroken descent. By Friday's quadruple witching close, the S&P 500 had posted its fourth consecutive weekly loss — falling 2.2% to 6,485.40 — while the Nasdaq plunged 3.1% and the Russell 2000 shed 2.7%. The AAII bearish sentiment reading crossed 50% for the first time since the early pandemic.

The numbers tell the story: rate cut odds collapsed from 95% to less than 15% in a month, Brent crude has risen from $70 to $108 in three weeks, and the S&P 500 now sits more than 5% below its February all-time high. This is no longer a correction narrative. It is a repricing of the entire 2026 outlook.

Weekly Scoreboard

The Week's Narrative

The story of this week is the story of a market that ran out of excuses. For three weeks, the dominant playbook was simple: sell the oil spike, buy the dip on any hint of de-escalation. Trump says something reassuring, Bessent goes on CNBC, oil pulls back, stocks recover. Rinse and repeat. That playbook exhausted itself between Wednesday morning and Friday afternoon.

Monday and Tuesday were the last act of the old regime. Secretary Bessent confirmed on CNBC that Iranian oil tankers were "getting out" through the Strait, materially reducing worst-case supply fears. Oil pulled back sharply, with WTI briefly dropping below $94. Nvidia's Jensen Huang took the stage at GTC and unveiled a $1 trillion order backlog for its Blackwell and Vera Rubin platforms. Meta announced a $27 billion deal with Nebius for AI infrastructure. The S&P 500 rallied 1.0% Monday and 0.66% Tuesday. Seven utility stocks hit all-time highs. For a moment, it felt like the recovery trade had legs.

Wednesday shattered that illusion on three fronts. First, the February PPI came in scorching hot — headline wholesale inflation at 0.7% month-over-month (consensus: 0.3%), the largest increase in over two years, pushing the year-over-year rate to 3.4%. Core PPI was equally ugly at 0.5% month-over-month versus the 0.3% expected. This was pre-war data, meaning the full impact of $100+ oil hadn't even begun to flow through the pipeline. Second, the FOMC held rates at 3.50-3.75% and the dot plot, while technically unchanged at one cut for 2026, tilted hawkish. Several officials shifted from two projected cuts to one, and Powell's press conference was unusually candid: "We just don't know" what will happen with oil. Third, Iran announced retaliatory strikes against energy infrastructure in Qatar, Saudi Arabia, and the UAE. Brent surged 3.8% to $107.38. The S&P 500 dropped 1.36%.

Thursday brought an eerie calm on the surface but devastating action below it. Iran struck Qatar's Ras Laffan Industrial City — home to the world's largest LNG export facility — for a second time in 24 hours. QatarEnergy declared force majeure on long-term contracts with Belgium, China, Italy, and South Korea. European natural gas prices surged 20%. Yet equities staged a modest late-day recovery after Netanyahu suggested the war could "end faster than people think." The S&P 500 fell just 0.28%, but gold collapsed 4.85% to $4,659 — its worst single-day decline in years — as margin calls from the oil trade forced liquidation across commodity portfolios.

Friday was the reckoning. Quadruple witching — the simultaneous expiration of stock index futures, stock index options, single-stock options, and single-stock futures — amplified every impulse in an already fragile market. Super Micro Computer (SMCI) crashed 33.3% after the DOJ charged its co-founder and two executives with smuggling Nvidia AI chips to China. The S&P 500 dropped 1.66%, the Nasdaq fell 2.18%, and the Russell 2000 plunged 2.19%. Volume was massive, confirming conviction behind the selling. The Pentagon announced it was sending three additional warships and thousands of Marines to the Middle East, extinguishing any remaining hope for a quick resolution. The S&P 500 closed more than 5% below its all-time high. Bear market psychology is beginning to take hold.

Sector Scorecard

Energy was the only sector to post a meaningful gain for the week, though the XLE has notably underperformed the underlying commodity — a sign that investors are skeptical about the sustainability of elevated prices. Utilities held up as the quintessential safe haven, with seven S&P 500 utilities hitting all-time highs on Monday alone. Technology was the worst performer, dragged down by SMCI's 33% implosion on Friday and broad semiconductor weakness. Consumer Discretionary suffered as Tesla retreated from $400 to $368 and rising gas prices threatened consumer spending power.

Movers of the Week

Top Winners

Top Losers

Economic Data Roundup

The economic data painted a bifurcated picture. Monday's manufacturing data was surprisingly strong: Empire State Manufacturing beat at 7.1 versus 4.0 expected, and industrial production surged 0.7% month-over-month, far above the 0.1% forecast. These readings suggest the real economy was holding up through mid-March, at least before the full oil shock feeds through. The labor market also remained tight, with initial claims at 205K — below expectations.

But the inflation and housing data told a darker story. The PPI report was the week's most consequential release: headline wholesale inflation at 3.4% year-over-year was the highest since February 2025 and arrived before the oil surge could fully impact producer costs. New home sales collapsed 17.6% to 587,000 — the lowest since 2022 — as rising mortgage rates and elevated gas prices crushed builder confidence. The NAHB Housing Market Index slid to 36, its weakest since mid-2023. The Atlanta Fed's GDPNow tracker fell to 2.3% from 2.7%, signaling deteriorating growth expectations.

Fed Watch & Rates

The Fed was the other dominant force this week. The FOMC held rates at 3.50-3.75% on Wednesday, as universally expected, with just one dissenter voting for a cut. The updated Summary of Economic Projections revised 2026 GDP growth higher to 2.4% from 2.3%, but also raised the PCE inflation forecast to 2.7% from 2.4% — a meaningful hawkish shift that acknowledges energy costs are filtering into the broader price environment.

The dot plot technically still showed one cut for 2026, but the balance shifted: several officials moved from two projected cuts to one, and the risks clearly tilted toward fewer reductions. Chair Powell was unusually candid in the press conference, saying "there has not been as much progress on inflation as he had hoped" and that the Fed "just doesn't know" what will happen with oil prices. He also confirmed he will not resign while his pending criminal investigation is outstanding, adding an unusual political dimension to the monetary policy outlook. Trump-nominated replacement Kevin Warsh's potential start date remains uncertain as a result.

Treasury yields rose across the curve. The 10-year yield climbed approximately 10.5 basis points on the week to 4.39%, while the 2-year surged 15 basis points. The yield curve flattened dramatically, with the 2-10 spread narrowing to its tightest in a year. Per Bloomberg, the probability of a June rate cut flipped from 25% to now showing a 24% chance of a hike. The October FOMC meeting, which had shown a 70% probability of a cut last week, now shows a 45% probability of a hike. The market has completely abandoned the easing narrative.

Geopolitical & Macro Developments

The Iran-US war continued to escalate throughout the week, with each day bringing new dimensions to the conflict's economic footprint. On Monday, U.S. allies rejected participation in a Hormuz convoy coalition, leaving the Strait effectively closed to commercial traffic. Iran struck a UAE gas field and Dubai International Airport with drones, killing four people and temporarily halting flights at the world's busiest international airport. Iran-linked cyberattacks hit Poland's nuclear research facility, Stryker's global operations, and multiple European targets.

The most consequential development came Wednesday night into Thursday, when Iran launched missile strikes on Qatar's Ras Laffan Industrial City — the world's largest LNG production facility — for two consecutive days. Shell's Pearl GTL plant sustained "extensive damage." QatarEnergy declared force majeure on long-term LNG contracts with Belgium, China, Italy, and South Korea, effectively wiping out 17% of Qatar's export capacity for three to five years. European natural gas prices surged 20% overnight. The strikes crossed a critical threshold: Iran was now attacking the energy infrastructure of ostensibly neutral Gulf states, expanding the war's economic damage far beyond the Strait of Hormuz.

On the diplomatic front, Netanyahu said Thursday that the war could "end faster than people think," briefly sparking a relief rally. But the Pentagon responded Friday morning by deploying three additional warships and thousands of Marines to the region. RBC Capital Markets warned that Houthi participation in the conflict could imperil the Red Sea alternative export route, potentially pushing oil "several legs higher." Treasury Secretary Bessent floated lifting sanctions on approximately 140 million barrels of Iranian oil "on the water" to temporarily suppress prices — a tacit admission that the administration's own war is creating an energy crisis it cannot solve through traditional policy tools.

Week Ahead Preview: March 24–28

Friday's data dump is the marquee event: the final Q4 GDP estimate, PCE prices (the Fed's preferred inflation gauge), and University of Michigan Consumer Sentiment. The PCE reading will be closely watched for any early signal of energy costs filtering into the Fed's preferred metric. The prior GDP estimate showed just 0.7% growth, and any further downward revision would intensify stagflation concerns. Durable goods on Wednesday will offer a read on business investment appetite in the current environment.

The earnings calendar is light, but GameStop on Tuesday could generate outsized volatility given the meme stock's sensitivity to retail sentiment. KB Home will provide another housing data point. The real driver, as it has been for weeks, will be weekend developments in the Middle East and Monday morning oil prices.

The AlphaEdge Take

This was the week the music changed. For three weeks, the market operated on a simple assumption: the Iran war would be short, oil would come back down, and the Fed would eventually cut rates. Each of those pillars cracked this week. The war entered its fourth week with no credible ceasefire framework. Oil settled above $107 Brent after intraday spikes above $119. And the Fed not only refused to signal emergency action but effectively told the market to prepare for rates staying higher for longer — or potentially going higher.

The technical picture has deteriorated meaningfully. The S&P 500 closed below its 200-day simple moving average for the first time since May 2025. The Nasdaq broke below its November low. The RSI on the S&P 500 hit 29, entering technically oversold territory. Market breadth contracted further, with just 48% of S&P 500 stocks trading above their 200-day moving averages and only 35% of Nasdaq components. Individual investor bearishness exceeded 50% for the first time since March 2020. These are conditions that historically precede either a sharp capitulatory flush or a powerful technical bounce — but rarely a gentle glide.

We see three scenarios from here. Our base case (40% probability) is a grind toward the 6,300-6,400 range on the S&P 500 over the next two weeks — continued deterioration without a catalyst for either a crash or a recovery. The war continues, oil stays elevated, and investors slowly reduce exposure. The second scenario (25%) is a diplomatic breakthrough that sends oil back to $85-95 and triggers a 4-6% relief rally. Possible, but nothing in three weeks suggests either side is ready to stand down. The third scenario (35%) is further escalation: Iran targets more Gulf infrastructure, Houthis imperil Red Sea shipping, Brent tests $120-130, and equities gap down 2-3% on a Monday open. This scenario has quietly become more likely, not less, as each week passes without progress.

Our posture is cautious. The oversold readings create the conditions for a sharp bounce, and experienced traders know that some of the market's best single-day rallies occur during the worst selloffs. But we are not calling a bottom. The fundamental drivers of this decline — a war with no end date, an inflation surge with no policy response, and a Fed that has lost the ability to provide a safety net — have not changed. Stay disciplined, stay hedged, and size positions for volatility. The next clear signal will come from one of two places: a credible ceasefire, or next Friday's PCE inflation report. Until then, the trend is down.