Options-based ETFs are surging in popularity among income-hungry investors, confirming that big yields are indeed selling points. However, many novice investors simply look at those tempting yields and jump right in without performing adequate due diligence. They shouldn't be skipping that evaluation process. It reveals that many ETFs in this category are covered call funds. There's nothing wrong with that. However, the dominance of call writing in the options income ETF space often prompts investors to ove ...