The article highlights T-Mobile US's robust performance over the last 5 years, with an average annual return of 15.71%, outperforming the market. This positive historical performance, especially in comparison to market averages, suggests a strong investment case for TMUS. Given the significant return on investment demonstrated, this information is likely to be viewed positively by current and potential investors, potentially leading to increased investor confidence and demand for TMUS shares in the short term.