What Affects Stock Prices: Demand, Supply, and Market Sentiment

If you’ve ever opened a stock market app and wondered why the price of a share goes up or down in minutes, you’re not alone. Stock prices change constantly, and understanding the reasons behind these

Written by: Yuvika Singh

Published on: August 28, 2025

If you’ve ever opened a stock market app and wondered why the price of a share goes up or down in minutes, you’re not alone. Stock prices change constantly, and understanding the reasons behind these movements can help you make smarter investment decisions. Let’s break down what affects stock prices by looking at demand, supply, and market sentiment.

Understanding the Basics

Before we go deeper, remember one thing: the stock market is a place where buyers and sellers meet. If more people want to buy a stock, the price usually goes up. If more people want to sell, the price usually goes down. This is the core principle of demand and supply. But in reality, emotions, news, and global events also play a big role.

Role of Demand and Supply

Just like any marketplace, stocks move based on how many people are interested in buying versus selling.

  • High Demand: When investors believe a company will perform well, they rush to buy its shares. This pushes the price up.
  • High Supply: When investors lose confidence or want to book profits, they sell their shares. This increases supply and can push the price down.

Factors influencing demand and supply include company performance, industry growth, and economic conditions. Even rumours can influence these forces in the short term.

Market Sentiment – The Emotional Factor

Market sentiment is basically the overall mood of investors. If the mood is optimistic (bullish), people buy more. If the mood is pessimistic (bearish), people sell more. This “emotional wave” can sometimes move prices even when there’s no big change in the company’s actual performance.

For example:

  • A positive budget announcement by the government might make investors feel confident, increasing demand.
  • Global political tensions or recession fears can make investors nervous, leading to more selling.

In short, what affects stock prices is not just logic and numbers, since emotions can sometimes drive the market faster than facts.

News and Events

The stock market reacts quickly to news. Announcements like interest rate changes, inflation data, quarterly results, or new policies can all shift prices. Global events like oil price changes or geopolitical conflicts also impact Indian stocks.

  • Positive News: Launch of a new product, better-than-expected profits, or favourable government policies can increase buying.
  • Negative News: Poor earnings, legal troubles, or regulatory penalties can increase selling pressure.

Company Performance

While emotions and market mood play their part, a company’s actual performance is still a major driver. Investors often look at revenue growth, profit margins, debt levels, and future plans before deciding whether to buy or sell.

For instance, if a company shows steady growth in earnings for several quarters, demand for its shares is likely to rise. On the other hand, falling profits might reduce investor interest.

Global Market Trends

India’s stock market doesn’t work in isolation. Movements in global indices like the US or Asian markets can influence local prices. Foreign investors play a big role here; if they invest heavily, it increases demand; if they pull out funds, it can trigger a fall.

Currency exchange rates, international trade policies, and global commodity prices (like gold and oil) also impact the market.

Speculation and Short-Term Trading

Some traders buy and sell stocks within hours or days, hoping to profit from short-term price movements. This speculative activity can cause sudden price spikes or drops, especially in less-traded stocks.

While speculation can add to volatility, it’s also a natural part of the market. For long-term investors, these short-term ups and downs often balance out over time.

Government Policies and Economic Indicators

Economic data like GDP growth, unemployment rates, and inflation directly influence investor confidence. Government policies on taxation, foreign investment, and industry regulations can also shape market trends.

For example, a reduction in corporate tax can boost company profits, which may attract more buyers, increasing prices.

How You Can Use This Knowledge?

Knowing what affects stock prices can help you avoid emotional decisions and focus on facts. Here are a few tips:

  • Follow credible news sources for company updates and economic trends.
  • Look at both short-term events and long-term fundamentals before investing.
  • Don’t panic during market volatility and focus on your financial goals.

Conclusion

Stock prices are like the heartbeat of the market: always moving, sometimes fast, sometimes slow. They’re influenced by a mix of hard data like company earnings and softer factors like investor mood. By understanding demand, supply, and market sentiment, you can see beyond the noise and make more informed decisions.

In the end, the market is a combination of numbers and human behaviour. Once you grasp what affects stock prices, you’ll realise it’s not about predicting every small movement, it’s about understanding the bigger picture and staying patient with your investments.

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