The Period-to-date report of GlobeAdvisor provides information on how your portfolio has performed on a one-day, month-to-date (MTD) and year-to-date (YTD) basis. The report is updated once per trading day, at approximately 8 p.m. EST. For each of the three time periods, it shows the actual dollar return and the return on investment on a holding-by-holding basis and for the portfolio as a whole. For example, the two columns under MTD show how many dollars you have actually gained or lost since the last day of the previous month for each holding, and the return on investment for each.
GlobeAdvisor relies on the industry accepted method of computing investment return which is based on the internal rate of return (IRR) algorithm. The rate of return calculated by IRR is the interest rate corresponding to a zero net present value of a series of cash flows. According to the Association of Investment Management Research, "the recommended measurement of performance for presentation of the performance of a single private equity investment is the investments internal rate of return." The rate of return is measured over the specific period in question. It is not annualized, and thus permits a direct comparison between your return and the return of popular benchmarks.
The dollar gain/loss computation takes into account any transactions that may have occurred over the three time periods. Computing the % return on an investment using the internal rate of return method is somewhat more complicated. It depends on what the value of an investment was at the beginning and end of a time period, and also on any cash flows that may have occurred over that time period, and exactly when they occurred. For example, suppose you owned 100 units of a fund worth $10.00 each on the first day of a month, and still held those 100 units on the 21st of a month when the unit value is $10.50. You can deduce that your month-to-date return on investment on the 21st is 5%. In this case, your return is exactly the same as the return of the fund itself. However, if during that period you bought 100 more units on the 10th at 10.40 and sold them on the 15th at 10.20, you clearly lost money on that transaction. The computation of return using the internal rate of return method takes this loss into account, and your return would be different from (and less than) the return on the fund overall.
Because returns calculated using the internal rate of return method take into account buys and sells occurring during the period of the calculation, returns on the Performance report will differ from the simple returns shown on Fund/Stock reports or on the GlobeAdvisor Standard report. Technically-minded users can gain more insight into the workings of IRR by looking at the help information available on IRR in Microsoft's Excel spreadsheet product.