5. Key performance measures Measuring Stock Performance An informed and prudent investor uses a variety of measures such as financial ratios, book value, eomings 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 understond how these walues 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) One of the most important features of a stock is its book value. The book value per share of ElecTrin's stock last year was equal to Electrin's book value per share has been since three years ago, a fact that refiects on the company's overall growth. Based on the given price and you can determine that ElecTrin's P/E is equal to One of the most important features of a stock is its book value. The book value per share of Electrin's stock last year was equal to Elecirin's book value per share has been since three years ago, a fact that reflects on the company's overali growth. Based on the given price and you can determine that Electrin's P/E is equal to One of the most important features of a rok value. The book value per share of Electrin's stock last year was equal to Electrin's book value per share has been since three years ago, a fact that reflects on the company's overall growth. Based on the given price and you can determine that Electrin's P/E is equal to One of the most important features of a stock is its book value. The book value per share of E rck last year was equal to Electrin's book value per share has been since three years ago, a fact that reflects on the company's overall growth. Based on the given price and you can determine that ElecTrin's P/E is equal to One of the most important fe. book value. The book value per share of Electinin's stock last year was equal to Electrin's book value per shar since three years ago, a fact that reflects on the compsny's overall growth. Based on the given price and you can determine that Elecirin's P/E is equal to One of the most important features of a stock is its book value. The book value per share of Electrit rear was equal to Electrin's book value per share has been since three years ago, a fact that reflects e company's overall growth. Based on the given price and you can determine that Electrin's P/E is equal to