Realty Income is a favorite among income-seeking investors. Here's how to figure out what you'll need to invest. Realty Income (O 0.26%) is one of the most popular real estate investment trusts, or REITs, and for good reason. Not only is it one of the largest, but it is also built to produce steady dividend income over time. It has declared 647 consecutive monthly dividends, and has never paused or reduced its dividend since listing on the New York Stock Exchange in 1994. Because of this, it is a favorite a ...