After looking at Drizzt's blog regarding the yearly percentage returns from Dow Jones here, I wanted to have a look to see how our very own STI would look like if the same information is sliced up and presented. Source: The raw data of ^STI is taken directly from Yahoo! Finance site here. The adjusted closing price is used and according to the same site, it refers to the closing price for each day adjusted for splits and dividends. Calculation of yearly returns: I take the adjusted closing price of the last market day of each year, divided by that of the first market day of each year, then subtracted by 1 and multiplied by 100%. Each calculation is rounded to 0 decimal places. Dividends are also not included in the returns, so are the costs of ownership and brokerage. For example, Adjusted closing price for 2012 (31st Dec) ......