Better Portfolio Performance Reporting
More detailed portfolio performance reporting. So that investors can keep track of weekly/monthly and then year-on-year/annualized performance on their investments & portfolios (i.e. Year one annualized performance is.... Year two annualized performance is... and so on). Think it would be useful if this included risk-adjusted metrics that give an indication of how well an investor's stock picking skills have been by displaying the level of risk taken on in relation to the return generated for each stock, and on an overall portfolio level. Things like VaR (Value at Risk) spring to mind.