The Yield On Cost (YOC) is a dividend yield on the initial cost of security, calculated by dividing the current annual dividend by the cost of the security (When You Buy). For example, you bought XYZ ETF two years ago, which cost you $50, and now the current dividend is $5.50 per share; that means the YOC for that ETF would be 11% - If the YOC is higher than the current dividend yield that is a good thing.