Upside refers to the potential increase in the value of an investment, portfolio, company, sector, market, or economy. Upside is measured in monetary value or percentage terms. Analysts commonly use either technical analysis or fundamental analysis techniques to predict the future price and upside of an investment, particularly when it comes to stock prices. A higher upside means that the stock has more value than is currently reflected in the stock price. Upside is the opposite of downside, which is the negative movement of an investment's price.