What Drives Stock Prices Up and Down?
📋 Driptometer Blog Post Post #021 | Topic: What Drives Stock Prices Up and Down? What Moves Stock Prices? Understanding Market Forces Published: July 28, 2026 | Category: Investing for Beginners Why does a stock jump 5% on Tuesday and drop 3% on Wednesday? To a beginner, these daily fluctuations can look entirely random or like a high-stakes casino game. However, a peek under the hood reveals that specific, identifiable forces control what moves stock prices across every financial exchange in the world. Whether you're looking at a single stock or a broad index like the S&P 500, price changes are never accidental. They are the constant real-time output of thousands of buyers and sellers weighing new information against long-term expectations. The Core Engine: Stock Supply and Demand At the most basic level, stock valuations are driven entirely by stock supply and demand . A stock exchange is simply an auction house. Every stock has a finite number of shares out...