What makes stock prices go up or down?
Although it may seem like a difficult question, it is quite straightforward.
Stock prices move due to differences in supply and demand.
The differences in supply and demand make stock prices move up or down. Many factors change the supply-demand equation in stocks.
Normal Demand – Normal Supply
This scenario represents an equilibrium between buyers and sellers. This is when a stock moves sideways on a stock chart, neither trending strongly upwards nor downwards. There is no pressure on supply or demand in either direction. We would tend to see an average day of volume and muted price movements on a stock chart. If the market is overall up for the day, you might see some upward drift of the stock price; there will also be no significant news that might sway the stocks or demand supply in either direction.
Low Demand – Low Supply
This is a day in the stock market where we see disinterested buyers and sellers. Typical volatility is low, there is little movement in the stock price, and the volume bars are lower than normal.
High Supply – High Demand
In this scenario, we will see a significantly higher volume of trades. This means that the buyers are buying heavily, and the sellers are equally selling heavily. This means in a stock chart, we might see some change in the stock price in either direction, but we would see a huge volume bar. If you view candlesticks, you might see what is called a Doji.
Supply Side Pressure
High Supply – Low Demand
Here the study of supply and demand starts to get very interesting.
Imagine, for example, a company announces very poor earnings for the quarter and suggests that the outlook is poor. Investors who hold the stock suddenly realize that their money could be better invested elsewhere. They start to sell the stock at market price. As the news of the company’s poor earnings gets digested, the buyers who were once interested in owning the stock suddenly start to back away from purchasing the stock. This causes a low demand for the stock. When combined with the high supply, the stock starts to plummet. The stock will fall to a point where the potential buyers start to feel the price is at a level where there is value.
Demand Side Pressure
High Demand – Low Supply
Let us take the opposite side of the story. Let’s say a company has just announced a record quarter and predicts a rosy outlook for the future. Those who own the stock are excited and expect to see further appreciation of their investment. Those who have been following the stock see this as the signal to start buying the stock. Those who own the stock are reluctant to sell as they expect more price appreciation; this restricts supply. Therefore, those who want to own the stock are willing to pay more to entice further sellers into the market. This boosts the stock price significantly. We will see a huge volume bar and a jump in the stock price in a stock chart. See Point 3. Massive Buying in the Netflix chart
This gives you a good understanding of what makes a stock price move. But there are many more factors to stock price movements than just earnings and positive outlooks.
Here are some other factors that play an important role:
- Investor sentiment and expectations
- Mergers and Acquisitions (M&A) Activity – Expected Takeover Target
- Industry Strength – the industry itself is hitting a growth cycle.
- Market Dominance – company has developed a market dominance that it can leverage
- Competitor Weakness – weak competition and failure of competitors in opening up new market share opportunities
- New Product Introductions – innovative product launches
- Analyst Upgrades or Downgrades should always be viewed with skepticism.
- Political or legislative changes that affect a company’s product or business model
Whatever causes the supply and demand equation to change, we should see it in the stock charts and act accordingly.
Do not forget that nearly all stock charts and indicators are based on two things only:
- Stock Price (Open, High, Low, Close)