The market, where seller supply and buyer demand are balanced, determines stock prices. But have you ever pondered about the forces that influence a stock's price, or what propels the stock market? Regretfully, we are unable to accurately predict how a stock's price will move using a simple equation. Still, there are certain things we do know about the factors that influence a stock's rise or fall. Three groups of influences can be identified: sentiment in the market, technical variables, and fundamental factors. Read more.