Here's a fun thing about markets: sometimes they just decide to be happy. Tuesday was one of those days. U.S. stocks pushed decisively higher, with the S&P 500 climbing back to levels not seen since before the recent geopolitical tensions. The catalyst? A simple, old-fashioned dose of hope that the world might be getting slightly less chaotic.

The optimism stemmed from fresh signs of progress in U.S.-Iran negotiations. Vice President JD Vance had already flagged "a lot of progress" over the weekend. Then, President Donald Trump fanned the flames in a midday interview with the New York Post, suggesting talks "could be happening over the next two days" in Pakistan. When the leader of the free world hints that diplomacy is working, markets tend to listen.

This narrative of de-escalation had an immediate and dramatic effect on one very important price: oil. If the risk of conflict in a major oil-producing region recedes, the "war premium" baked into crude prices starts to evaporate. And evaporate it did. WTI crude collapsed 6.7% to roughly $92.46 a barrel, while Brent slid 3.9% to near $95.48. That's a nearly 7% haircut for one of the market's most watched commodities.

Cheaper oil is like a tax cut for the economy, especially for certain sectors. So, as crude tanked, stocks that benefit from lower energy costs took off. It was the classic "de-escalation trade" in full swing.

On the macro front, there was more good news. Producer inflation for March came in sharply below expectations. In a market still a bit jumpy about inflation, cooler data is always welcome. It gave the Federal Reserve more breathing room and added another layer of confidence to the day's rally.

The Index Scorecard

Let's look at the numbers. The broad market advance was, well, broad.

The S&P 500 (SPY) rose 1.1% to 6,960, hitting its highest level since late February. It's now within striking distance of the 7,002-point all-time high reached in late January. The Dow Jones Industrial Average (DIA) climbed 347 points, or 0.7%, to 48,565.

The tech-heavy Nasdaq 100 (QQQ) outperformed, advancing 1.5% to 25,776. That marked its 10th straight session of gains—the longest winning streak since 2021. Not to be outdone, small caps had a great day too. The Russell 2000 (IWM) led the major benchmarks with a 1.4% pop to 2,708, extending its rebound off March lows to an impressive 12%.

Sector Story: Airlines Up, Energy Down

The sector performance told a perfect story of the day's theme. The biggest winner was the Consumer Discretionary Select Sector SPDR Fund (XLY), which jumped 2.3%. This wasn't about people suddenly buying more couches; it was powered by travel and leisure stocks anticipating lower fuel costs.

The standout industry was airlines. The U.S. Global Jets ETF (JETS) skyrocketed 4.9%. The move was turbocharged by deal chatter, with reports that United Airlines Holdings Inc. (UAL) CEO Scott Kirby had pitched senior officials on a potential merger with American Airlines Group Inc. (AAL) earlier this year. American's stock surged 8.9% on the news.

Other carriers joined the party: Delta Air Lines Inc. (DAL) climbed 7.2%, Alaska Air Group Inc. (ALK) rose 7.6%, and Southwest Airlines Co. (LUV) gained 5.7%. When jet fuel gets cheaper and merger rumors fly, airline stocks can have a very good day.

On the opposite end of the spectrum was the energy sector. The Energy Select Sector SPDR Fund (XLE) slumped 2.3% as the crude rout dragged down producers and services firms. The SPDR S&P Oil & Gas Exploration & Production ETF (XOP) tumbled 2.8%, and the VanEck Oil Services ETF (OIH) slid 1.8%. Individual producers like APA Corporation (APA), Occidental Petroleum Corporation (OXY), and ConocoPhillips (COP) fell 5.8%, 4.6%, and 4.2%, respectively. It's a simple equation: oil price down, oil stocks down.

Tech and Magnificent Seven Check-In

Within the tech universe, the "Magnificent Seven" had a solid day, led by a 4.6% jump in Meta Platforms Inc. (META). Tesla Inc. (TSLA) rose 3.9%, Amazon.com Inc. (AMZN) gained 3.6%, and NVIDIA Corp. (NVDA) added 2.7%. Apple Inc. (AAPL) stock initially slipped but recovered slightly by the close.

But the real tech story of the moment might be semiconductors. The iShares PHLX SOX Semiconductor Sector Index Fund (SOXX) rallied to record highs, up for its 10th straight session—its longest streak since 2017. Over that 10-day window, chipmakers have soared over 27%, marking the sector's strongest rally since 2002. When markets are risk-on, semiconductors often lead the charge.

Earnings and Other Notable Movers

Bank earnings provided a mixed bag, splitting the tape. JPMorgan Chase & Co. (JPM) edged 0.2% lower after trimming its net interest income guidance. Wells Fargo & Co. (WFC) had a rougher go, tumbling nearly 5% after a disappointing first-quarter print.

On the brighter side, BlackRock Inc. (BLK) rallied 4% and Citigroup Inc. (C) rose 1.6% on upbeat results. Over in healthcare, Johnson & Johnson (JNJ) slipped 0.4% even after raising its 2026 revenue outlook.

Elsewhere, fintech and crypto-adjacent names caught a bid. Robinhood Markets Inc. (HOOD) led the entire Russell 1000 with a 9.6% gain. Coinbase Global Inc. (COIN) rose 6.9%, and Circle Internet Group Inc. (CRCL) climbed 8.1%.

Not every stock joined the celebration, of course. The day's worst performer was CarMax Inc. (KMX), which cratered 15%. AST SpaceMobile Inc. (ASTS) dropped 10.8%, and Akamai Technologies, Inc. (AKAM) fell 5.4%.

Tuesday's Top Performers and Laggards

Here's a quick snapshot of the biggest moves in the Russell 1000:

So, what's the takeaway from Tuesday's action? Markets are forward-looking machines. They don't just price in what is happening today; they price in what they think will happen tomorrow. And today, they priced in a tomorrow with less geopolitical risk and cheaper oil. That sent stocks soaring and crude plunging in a textbook example of a market rotation. Whether the optimism holds depends on the diplomats, but for one day at least, Wall Street was in a decidedly good mood.