Trading 101: What Actually Makes Share Prices Go Up And Down? By: Benzinga via Benzinga July 29, 2017 at 09:57 AM EDT For the uninitiated, the day-to-day price changes of stocks may seem mystical, but what the basic mechanism by which the price of shares ... Read More >> Related Stocks: Dow Industrials SPDR SPDR S&P 500 ETF Trust