Earnings Season 101: What Actually Moves a Stock on Earnings Day

Every quarter, thousands of companies report earnings — and it's one of the most confusing times for retail investors, because a company can "beat earnings" and still crash 10% the same day. Here's why.

The number everyone watches isn't the number that matters most. Wall Street doesn't react to raw earnings — it reacts to earnings relative to expectations. Analyst estimates set the bar, and stocks move on the surprise (beat or miss), not the absolute result. A company growing profits 20% year-over-year can still fall hard if analysts expected 25%.

Two numbers, not one:

1. EPS (earnings per share): Did profit come in above or below the consensus estimate?

2. Revenue: Did sales come in above or below estimate? A revenue miss with an EPS beat often means cost-cutting drove the "beat," not real business strength — and markets frequently punish that combination.

The real driver: guidance. Quarterly results are backward-looking — they tell you what already happened. Guidance (management's outlook for the next quarter or year) is forward-looking, and it's usually the bigger stock mover. A great quarter paired with cautious guidance for what's ahead can send a stock down even on a clean beat, because the market is pricing in the future, not the past.

Margins tell the quality story. Revenue growth funded by shrinking margins (i.e., selling more but making less profit per dollar of sales) is viewed very differently than revenue growth with expanding margins. Watch gross margin and operating margin trends, not just the top-line growth rate.

Why the reaction can look "irrational": It usually isn't — it's the market re-pricing based on updated information about the future, which is more important to a stock's value than the quarter that just ended. Understanding this reframes "the stock dropped after good earnings" from confusing to expected.

The takeaway: Before reacting to an earnings headline, ask three questions: Did it beat on both revenue and EPS? What did guidance say? Were margins expanding or shrinking? Those three answers explain almost every "surprising" earnings reaction.

We cover the macro backdrop shaping the whole earnings season — rates, dollar strength, sector positioning — daily inside Northbound Macro.

The Dollar Index (DXY): Why a Stronger Dollar Isn't Always Good News

"Strong dollar" sounds like it should be good — and sometimes it is. But a rising dollar cuts multiple ways depending on who you are and what you own. Here's the framework.

What DXY actually measures: The U.S. Dollar Index tracks the dollar's value against a basket of major currencies (euro, yen, pound, and others, with the euro weighted heaviest). It's not "the dollar's value" in an absolute sense — it's the dollar's value relative to other currencies.

Why it moves: Interest rate differentials drive most of it. If U.S. rates are higher (or expected to stay higher) than rates in Europe or Japan, global capital flows toward dollar-denominated assets to capture that yield, pushing the dollar up. Risk sentiment matters too — the dollar is a classic "safe haven," so it often strengthens during global uncertainty even when U.S. conditions haven't changed.

Who a strong dollar helps:

• U.S. consumers buying imported goods (your money buys more)

• U.S. travelers abroad

• Companies that import raw materials priced in dollars

Who it hurts:

• U.S. multinational companies with large overseas revenue — their foreign earnings translate into fewer dollars when converted back. This is a real drag on S&P 500 earnings for companies like industrials and tech giants with heavy international sales.

• Emerging markets, especially those with dollar-denominated debt — a stronger dollar makes their debt effectively more expensive to service.

• U.S. exporters — American goods become more expensive for foreign buyers.

The connection to what we've been covering: A stronger dollar and rising Treasury yields often move together, since both can reflect the same thing — the market pricing in higher-for-longer U.S. rates relative to the rest of the world. When you see yields, the dollar, and rate expectations all moving in the same direction, that's usually one macro story, not three separate ones.

The takeaway: Before assuming "strong dollar = good," ask who's actually exposed — a domestic-focused small-cap company and a multinational mega-cap can have opposite reactions to the exact same DXY move.

We break down how currency moves ripple through specific sectors and holdings daily inside Northbound Macro.

CPI vs. PCE: Which One Actually Moves Markets

You'll hear both numbers thrown around every month — CPI and PCE. They both measure inflation, they often disagree, and only one of them is the Fed's actual scoreboard.

CPI (Consumer Price Index): Released by the Bureau of Labor Statistics, mid-month, and it's the one that hits headlines first. It measures a fixed "basket" of goods and services that a typical urban household buys.

PCE (Personal Consumption Expenditures): Released by the Bureau of Economic Analysis, usually a couple weeks after CPI, and it's what the Federal Reserve officially targets at 2%. Two key differences from CPI:

1. It adjusts the basket as people substitute. If beef gets expensive and people buy more chicken, PCE captures that shift. CPI's basket is more fixed, so it doesn't adjust as quickly.

2. It includes spending paid on your behalf — think employer-provided health insurance — that CPI leaves out. This makes healthcare weigh differently between the two.

Why the gap matters for you: PCE almost always runs a bit lower than CPI because of the substitution effect. If you only follow CPI headlines, you may think inflation is worse than the number the Fed is actually reacting to. That's a real source of confusion every time a "hot CPI print" hits the news — traders immediately ask "will PCE confirm this?" before reacting for real.

The practical rule: CPI moves markets first because it's released first and grabs headlines — expect a same-day reaction in stocks, bonds, and the dollar. PCE is the one that actually shapes what the Fed does next. A hot CPI with a cooler PCE two weeks later often means the initial market reaction gets partially unwound.

Bottom line: Watch CPI for the headline reaction. Watch PCE for the real policy signal. If you're only tracking one, you're only getting half of what markets are pricing in.

Want the full walkthrough on how we trade the gap between the two? That's inside Northbound Macro.

The 10-Year Treasury Yield: The One Number That Quietly Runs Your Portfolio

Most retail investors watch the S&P 500. Professionals watch the 10-year Treasury yield. Here's why that gap matters.

What it actually is: The 10-year yield is the return the U.S. government pays to borrow money for 10 years. It moves daily based on auctions and trading, and it's set by supply/demand for that debt — not by the Fed directly (the Fed controls short-term rates; the 10-year is a market price).

Why it moves everything else:

1. It's the "risk-free" comparison point. Every other investment gets priced relative to it. If the 10-year yields 4.7%, a stock needs to offer a real chance at beating that, adjusted for risk, or money flows to bonds instead.

2. It sets mortgage and loan rates. Mortgage rates track the 10-year, not the Fed funds rate directly. When the 10-year rises, borrowing costs for consumers and companies rise with it — even if the Fed hasn't moved.

3. It reveals what the market believes about the future, not just today. Rising yields can mean the market expects stronger growth, higher inflation, more government borrowing — or some mix of all three. Falling yields often mean the opposite: growth worries or a flight to safety.

The mental model to use: Yields up + stocks up = the market thinks growth justifies it (bullish read). Yields up + stocks down = the market is worried about inflation or tightening squeezing valuations (bearish read). Same direction, opposite meanings — the combination is what tells the story, not the yield alone.

Why this matters for your portfolio: If you hold long-duration growth stocks, rate-sensitive sectors (real estate, utilities, small caps), or you're evaluating whether "the market looks expensive," the 10-year is your reference point before you even open a stock chart.

This is the kind of framework we break down daily inside Northbound Macro — plain-English reads on what's actually moving markets, without the jargon. Come see what today's numbers are telling us.

I spent years watching people panic-sell every time the Fed said a sentence, so here's the framework I use to actually parse what matters.

The mistake: treating every Fed statement as equally important. It's not. There are three things that move markets, and everything else is noise:

1. The dot plot (released quarterly) — this is the Fed's own forecast of where rates are headed. This moves markets more than anything Powell says in the press conference.

2. The language shift — not what they say, but what changed from last time. "Elevated inflation" becoming "inflation has eased" is a bigger deal than any single data point.

3. The reaction function — what data are they actually watching right now? It rotates. In 2022-23 it was CPI. Lately it's been the labor market. Know which one is in the driver's seat.

The tell most people miss: watch the 2-year Treasury yield in the 30 minutes after an FOMC statement drops — before Powell even opens his mouth in the presser. That's the market pricing in the actual policy path, not the theater.

I write a short daily breakdown of this stuff — cutting the theater from what actually matters for your portfolio. No hot takes, no fear-mongering, just what changed and why it matters. Figured I'd share the free tier here in case it's useful to anyone else tired of doom-scrolling finance Twitter for signal.