Which factor does NOT directly influence stock prices?

The factor that does not directly influence stock prices is the color of the company's logo. Stock prices are primarily affected by more substantial elements that relate to the company's financial health, market conditions, and investor sentiment.

Market psychology plays a significant role in stock pricing as it reflects the emotions and reactions of investors to news about the company and the larger market environment. The overall economy also heavily influences stock prices, as economic indicators such as GDP growth, unemployment rates, and consumer confidence can affect investor outlook and decision-making. Similarly, a company's historical financial performance, including revenue, profit margins, and other key metrics, directly informs investors about the company's viability and future prospects, impacting its stock price.

In contrast, the color of a company's logo has little to no tangible impact on its market valuation or the financial fundamentals that investors consider when buying or selling stock. While a logo can play a role in brand perception and customer loyalty, it does not affect the actual financial drivers that lead to changes in stock prices.