Measuring Stock Performance An informed and prudent investor uses a variety of measures such as financial ratios, book value, earnings per share, return on equity etc. to evaluate the worthiness and prospects of stocks he/she would invest in. It is important for you as an investor to understand how these values are calculated and what they mean. Use the following tables to assess the worthiness of ElecTrin stock as an investment. Electrin Stock Data (Current and Historical) 1:18PM EDT Today Price Change Mkt cap Div/yield 537.07 USD +10.21 (+1.94%) 173.4B Shares 322.89 Beta 1.13 Book/share 161.128 EPS 28.25