In one example, when a user reads content on a web browser, the content may contain information about companies, and may suggest, to the user, various financial transactions to be performed with respect to those companies. For example, the user may want to react to financial news about a company by buying or selling stock in the company. A software component (e.g., a browser plug-in) may be used to evaluate content that the user is reading, and to display a user interface that allows the user to perform financial transactions based on the content. For example, if the user reads a news article about a company, the software component may display an interface that shows the ticker symbol of the company's stock and allows the user to initiate a transaction to buy or sell that stock.