Metrics similar to Gross Profit Margin in the efficiency category include:
PEG Ratio - A heuristic used to measure the level of earnings growth reflected in a stock's market price.
3 Week Price Total Return - The total change in price (adjusted of dividends and splits when applicable) over the last 3 weeks.
Marginal Equity Risk Premium (Operating Country) - Marginal equity risk premium in the country where the company operates over the U.S. equity risk premium as estimated by professor Aswath Damodaran at NYU Stern. Source: http://pages.stern.nyu.edu/~adamodar/New_Home_Page/datafile/ctryprem.html.