How do RIETS work?

[Martin Hernandez]

Hello, I am Martin. I am new to the real estate world. Which brings me to my question. What are REITS??

To my basic understanding RIETS are like bonds that you invest in then slowly pay you back based on your initial investment? I know their are risks invlolved with any investment, but in which ways can someone lose more money than their initial investment? Also are you allowed to cash out at any time? And for the same price, or does the price go up like a stock??? 

Answers to any of my questions would be great. Thanks much in advance.