During the last semester of economics, I invested and monitored the stock market. I learned how risky investing in certain companies can be and that proper research on companies is detrimental before purchasing stocks. Three stocks that have influenced most of my financial gains and losses are Twitter, Amazon, and Pepsi. I would like to introduce you to Twitter Inc., a modern and popular form of self-expression on the Internet. It offers users a multitude of services, including Twitter, an application that allows the user to share and distribute content to their followers. The company also owns Vine, a mobile app that lets users create and share short, looping videos, and #Music, another mobile app that helps users find new music and artists based on tweets. Twitter Inc. also provides a set of tools, public APIs, and embeddable widgets that developers can use to contribute their content to its platform. Twitter was founded in San Francisco in 2006. Today, Twitter has 255 monthly active users and 500 million tweets sent per day (Twitter Inc.). Unfortunately, Twitter Inc. failed to progress during the time I invested in their company. In December 2013, Twitter Inc.'s net profit was -511,471,000, this figure decreased by more than half to -132,362,000 as of March 31, 2014 (Yahoo Finance). Both of these quarterly net incomes are negative numbers that indicate financial losses. The recent drop in stock prices appears to be the cause of the decline in Twitter timeline views per monthly active user. People are now discussing the relevance factor for Twitter because most users don't know what to do when they are on Twitter. As a result, some people open an account and then no longer use the site. In the recent period...... middle of paper ...... quantities supplied, shifting the market equilibrium toward a higher equilibrium quantity and a lower equilibrium price. I think this explains PepsiCo's increase in revenue, which is why their stocks have increased this year. I really wish I hadn't sold them so soon. Even though the majority of my stocks weren't doing very well, I learned through my research that stock prices steadily increased during this semester. This may suggest that consumer confidence has improved and that the U.S. economy continues its recovery from the 2008 financial crisis. More and more consumers appear to trust the private sector and are investing their money in companies that provide various goods and services to the national economy. I conclude that the US economy is growing and I hope it continues to grow for a long time..