Why can a stock fall after record profits?

Markets price expectations, not history. If results — however strong — fall short of what investors already expected, or the company guides cautiously for next quarter, the price can drop even on record numbers.

What actually moves a stock price minute to minute?

Only supply and demand. Every trade is a buyer and a seller agreeing a price; when more money wants in than out, the price rises, and vice versa. News matters only insofar as it shifts that balance.

What factors make a stock price go up or down?

They fall into two groups. Company-specific catalysts include earnings results and guidance, analyst upgrades and estimate revisions, and product, management or deal news. Market-wide catalysts include interest-rate changes, economic data like inflation and jobs, and geopolitical shocks. Each only moves the price to the extent it differs from what investors already expected.

What are bull and bear markets?

A bull market is a sustained period of rising prices and optimism. A bear market is a sustained decline — usually defined as 20% or more off the highs — accompanied by pessimism and caution.

Why did my stock go down today if no bad news was announced?

Stocks can fall without a news trigger. Broad market moves (interest rate changes, economic data), sector-wide selling, or simply more sellers than buyers on that day are all sufficient causes. Individual stocks do not need a company-specific reason to move on any given day — markets are influenced by thousands of participants reacting to different information at once.

What is a market correction?

A market correction is a decline of 10% or more from a recent peak. It is shallower than a bear market (20%+ decline) and is generally considered a normal, healthy part of any bull run — historically the S&P 500 has experienced a correction roughly once a year on average.

Why do fear and greed override rational analysis?

Because markets are made of people, not spreadsheets. When prices fall sharply, fear of further loss triggers selling that has little to do with company fundamentals. When prices surge, greed and FOMO pull in buyers regardless of valuation. This emotional amplification is why markets regularly overshoot in both directions.

Why Do Stock Prices Move? Supply, Demand and Expectations

Supply and demand — but what drives demand?

Stock prices move on supply and demand: when the desire to buy a stock outweighs the desire to sell, the price rises; when sellers are more eager, it falls. That much is true — but it only pushes the question back.

What makes thousands of people decide to buy or sell at the same moment? Use the simulator to see how the balance of buyers and sellers sets the price — then we'll get to what actually tips that balance.

Supply & demand simulator

Shift the balance and watch how price responds.

New price

$100.00

from $100.00unchanged

50 want to buy50 want to sell

Buyers50

Sellers50

Buyers and sellers are evenly matched — they broadly agree on fair value, so the price barely moves. It takes an imbalance to push it either way.

The real question

Supply and demand explains the mechanism, not the cause. What makes thousands of investors simultaneously decide to buy or sell? The answer: changing expectations about the future.

Markets price the future, not the past

This is the most counterintuitive thing about stocks — and once you understand it, you will never be confused by financial news again. Stock prices are not a report card for what happened; they are a collective bet on what is going to happen.

That is why a company can report record profits and still fall 15%. If investors expected even bigger profits, the record results are a disappointment relative to expectations. Click each scenario to see how the same event produces opposite reactions.

The expectations game

Same event, different outcomes — depending on what was expected before it happened. Click a card.

The pattern to memorize

Stock price = what investors currently believe about the future. A price move = the gap between new information and what was already believed. Better than expected → price rises. Worse than expected → price falls. Exactly as expected → price barely moves.

What actually moves a stock

If prices move when expectations change, the practical question is: what changes them? A handful of recurring catalysts do most of the work. They split into two groups — things specific to one company, and things that move the whole market at once.

Company-specific

·Earnings & guidance — quarterly results versus expectations, and what management says about next quarter, are the single biggest mover.
·Analyst upgrades & estimate revisions — when analysts raise or cut their forecasts, expectations shift with them.
·Product, management & deal news — a launch, a CEO change, a merger or acquisition all rewrite the future story.

Market-wide

·Interest rates — when central banks raise or cut rates, the value of every future dollar of profit re-prices, moving nearly all stocks at once.
·Economic data — inflation, jobs and growth figures shift expectations for the whole economy.
·Shocks & geopolitics — wars, crises and surprise events can swing sentiment market-wide in hours.

The common thread

Every catalyst on this list works the same way: it only moves the price to the extent it differs from what was already expected. A widely anticipated rate cut barely registers; a surprise one moves everything. Guidance gets a lesson of its own in the Earnings Season course.

Bull markets, bear markets, and everything between

Individual stocks move for company-specific reasons, but the whole market moves together too — driven by the economy, interest rates and collective psychology. These broader phases have names. Click each one to understand what it means.

Market phases — a stylized index over time

These aren't a fixed sequence — markets move between them.

Bull market

A sustained period of rising prices — typically 20%+ gains over months or years.

Driven by strong economic growth, low unemployment and rising corporate earnings
Investor confidence is high — people are eager to buy
Can last years: the 2009–2020 US bull market ran 11 years
Risk: late-stage bulls often breed complacency and overvaluation

Bull market

A sustained period of rising prices — typically 20%+ gains over months or years.

Threshold: +20% from a prior low
Duration: Months to years (2009–2020 US bull ran 11 years)
Trigger: Strong economic growth, low unemployment, rising corporate earnings

Bear market

A decline of 20% or more from recent highs, sustained over months.

Threshold: −20% from a recent peak
Duration: ~9–14 months on average (historical range: 3 months–2+ years)
Trigger: Recession fears, aggressive rate hikes, financial shocks, or credit crises

Correction

A pullback of 10–19% from recent highs — common and healthy.

Threshold: −10% to −19% from a recent peak
Duration: Weeks to a few months; tends to reverse faster than a bear market
Trigger: Stretched valuations, specific bad news, or sentiment shifts — not full recessions

Crash

A sudden, severe fall — playing out in days rather than months.

Threshold: Rapid drop of 20%+ over days or weeks (no fixed minimum)
Duration: Days to weeks; the plunge itself is brief — recovery can take years
Trigger: Panic, forced deleveraging, extreme uncertainty, or systemic financial stress

Recovery

The phase after a bottom, when prices begin rising again — often the first leg of the next bull market.

Threshold: Begins when the index posts sustained gains from its trough
Duration: Months to years; starts before the economy physically improves
Trigger: Policy stimulus, improving earnings expectations, or fading crisis uncertainty

Phase	Definition	Threshold	Typical duration	Common trigger
Bull market	A sustained period of rising prices — typically 20%+ gains over months or years.	+20% from a prior low	Months to years (2009–2020 US bull ran 11 years)	Strong economic growth, low unemployment, rising corporate earnings
Bear market	A decline of 20% or more from recent highs, sustained over months.	−20% from a recent peak	~9–14 months on average (historical range: 3 months–2+ years)	Recession fears, aggressive rate hikes, financial shocks, or credit crises
Correction	A pullback of 10–19% from recent highs — common and healthy.	−10% to −19% from a recent peak	Weeks to a few months; tends to reverse faster than a bear market	Stretched valuations, specific bad news, or sentiment shifts — not full recessions
Crash	A sudden, severe fall — playing out in days rather than months.	Rapid drop of 20%+ over days or weeks (no fixed minimum)	Days to weeks; the plunge itself is brief — recovery can take years	Panic, forced deleveraging, extreme uncertainty, or systemic financial stress
Recovery	The phase after a bottom, when prices begin rising again — often the first leg of the next bull market.	Begins when the index posts sustained gains from its trough	Months to years; starts before the economy physically improves	Policy stimulus, improving earnings expectations, or fading crisis uncertainty

Duration averages based on historical US market data (Ned Davis Research / CFRA). The 2020 crash statistic (−34% in 33 days) refers to the S&P 500 peak-to-trough move from February 19 to March 23, 2020. Past patterns do not guarantee future phase durations.

Fear and greed — the two forces that override logic

Rational analysis explains a lot of price movement, but not all of it. Two very human emotions — fear and greed — regularly push prices far beyond what any fundamental analysis would justify. Understanding them protects you from your own worst instincts.

Fear & Greed meter

Move the slider to explore how sentiment shifts investor behavior.

Extreme FearExtreme Greed

Neutral

The market is fairly priced relative to recent history — neither stretched up nor beaten down.

Sentiment

When fear dominates

Investors sell even good companies. Prices fall below fundamental value, and long-term buyers see opportunity. Warren Buffett: "Be greedy when others are fearful."

When greed dominates

Investors buy anything that is going up. Prices detach from reality and bubbles form — the dot-com crash, 2008 housing and crypto in 2021 all followed extreme greed.

Why someone would bet against a stock

Everything so far has been about buying because you think a price will go up. But some investors do the opposite — they profit when a stock falls. This is called short selling, and it explains why bad news sometimes causes a drop that seems too fast to be real.

You borrow 10 shares from someone who owns them
A broker facilitates this. The original owner still "owns" them on paper, but you temporarily hold them — and pay a borrowing fee for the privilege.
You sell those 10 shares immediately at today’s price ($50 each = $500)
You now hold $500 cash but owe 10 shares back to the lender. You are betting the price falls before you have to return them.
Price falls to $30. You buy 10 shares back for $300.
You return the 10 shares as promised. Your profit: $500 − $300 = $200 (minus fees). You made money as the stock fell.
The risk: if the price rises, your losses are unlimited
If the stock goes from $50 to $200, you still have to buy 10 shares back to return them — now for $2,000. The $500 you received from the sale isn't yours to keep — you owe the shares back — so it won't cover the buy-back, and there's no ceiling on how high the price (and your loss) can go. This is why short selling is dangerous, and why short squeezes (like GameStop in 2021) can be so violent.

Why this matters for you

You probably will not short sell. But knowing shorts exist explains why stocks sometimes move violently on bad news — short sellers selling at the same time as scared long investors — and why some stocks rocket upward when short sellers get squeezed and must buy back at any price.

Check your understanding

0/3 answered

01/ 03

A major retailer announces it hired 10,000 new employees and is opening 200 new stores next year. Despite this positive-sounding news, the stock falls 8%. What is the most likely reason?

02/ 03

During the 2020 Crash, the S&P 500 fell 34% in 33 days — the fastest bear market in history — then fully recovered in 5 months. What best explains this speed in both directions?

03/ 03

What does "the market is forward-looking" mean in practice?

Now play: Chart Challenge

Can you identify the market phase from a price chart alone? You will be surprised how quickly the patterns start to click.

Play Chart Challenge

Next up: stocks vs bonds vs ETFs vs crypto — how to tell the major asset classes apart.

Key takeaways

Stock prices reflect what investors collectively believe about a company's future — not its past results.
Better-than-expected news pushes prices up; worse-than-expected pushes them down; exactly-as-expected barely moves them.
Bull markets are sustained rises; bear markets are declines of 20% or more — both are driven by shifting expectations and psychology.
Fear and greed regularly push prices beyond what fundamentals justify — recognising this protects you from acting on emotion.
Short sellers profit when prices fall, which is why bad news can trigger moves that seem disproportionately fast.

Why do stock prices move?