The short answer: buyers and sellers
At the most basic level, a stock price moves for exactly one reason: there are more determined buyers than sellers (price rises) or more determined sellers than buyers (price falls). Everything else — earnings, rates, news — only works because it influences those buyers and sellers. If you are not yet sure how supply and demand actually produce a price, first read our page on supply, demand & order flow.
The four big drivers
Earnings & fundamentals
Over the long run, a stock price follows the company’s profits. If earnings grow year after year, the value of the business — and its share price — tends to rise.
Expectations & guidance
The outlook matters even more than current numbers. An optimistic forecast from management can drive a stock more than the reported profit itself.
Interest rates & the economy
Rate levels, inflation, and growth change how attractive stocks are versus alternatives — and how much future profits are worth today.
Sentiment & psychology
Fear and greed move whole markets in the short run. In panics, people sell regardless of fundamentals; in euphoria, they buy regardless of them.
The biggest beginner misunderstanding
Many beginners believe “good news = price up.” In reality, prices react to surprises. The market constantly tries to anticipate the future and “price it in” to today’s quote. If good news was already expected, it is already in the price — so when it arrives, little may happen, or the stock can even fall because some had hoped for something better.
Example: a company reports 20% higher profit. Sounds great — but analysts expected 25%. Result: disappointed expectations, the price falls. It is not the number that matters, but the gap to what was expected.
Why interest rates matter so much
Interest rates are the “price of money” and work through two channels. First: when rates rise, safe assets like bonds or savings pay more — stocks must compete with that and become relatively less attractive. Second: a stock’s value rests on its future profits. The higher the rate, the less those far-off profits are worth today (this is called discounting). Fast-growing tech stocks, whose value lies far in the future, are therefore especially sensitive to rate changes.
Short term vs. long term
A famous saying goes: in the short run the market is a voting machine, in the long run a weighing machine. Short term, sentiment, headlines, and positioning rule — a price can drift away from fundamentals for days or weeks. Long term, the reality of profits pulls the price toward it. For beginners this is reassuring: the daily noise matters less than it seems, as long as the underlying business grows soundly.
Related reading
Frequently asked questions
Why does a stock sometimes fall on good results?
Because the market had already expected — and priced in — the good results. Prices trade the future. If a company reports record profit but analysts expected even more, that is a relative disappointment and the price can fall. What matters is the deviation from expectations, not the headline itself.
What is the price-to-earnings (P/E) ratio?
The P/E ratio compares a stock’s price to its annual earnings per share. A high P/E means investors are willing to pay a lot for each euro of profit — usually because they expect strong future growth. It is a rough gauge of how expensive or cheap a stock is relative to its earnings.
How do interest rates affect stock prices?
Rising rates often weigh on stocks: bonds and savings pay more, making shares relatively less attractive. Future company profits are also worth less today when discounted at higher rates. Falling rates usually work the other way and support prices.
Why do stocks move so much on earnings day?
Earnings are one of the few moments with hard, new facts. When revenue, profit, or especially the outlook differs from expectations, every participant revises their view at the same time — producing large, jumpy moves.
Can I predict where a stock will go?
Not reliably. Prices already reflect the collective knowledge and expectations of all participants. Moves come from new, surprising information — and surprises are by definition unpredictable. That is why experienced investors rely on diversification and risk management rather than certain forecasts.