I'd like to be able to access historical total (market) return data with the end goal of creating a rolling return histogram of various asset allocations.
However, it looks like the GoogleFinance functions can only access share prices, not dividends. For this data to be useful to me, I would like to include the effects of reinvesting the dividends. I don't know of what use historical data is without any indication of dividend returns.
Is there a way to include dividends in a Google docs spreadsheet? Or even better, is there an online tool that will already show histograms (or show some variance metric) for various distributions?