Hello- I'm just a lowly college student, but I'll soon have enough money saved away to begin investing. While I wait, I've been playing around with an investment simulator. In the past week, I've noticed a pattern in certain highly-traded low-price stocks: they oscillate rapidly between two prices (usually 1 cent apart). Fannie Mae (FNM) is a good example: it spent most of Friday bouncing between $1.01 and $1.02. I tried looking ask/bid prices up on Yahoo, but it just gave me âN/Aâ. I'm deeply suspicious of this behavior; it seems WAY too easy to scalp a 1% profit in the span of 10 minutes. But, the Investopedia simulator seems to think I can do just that. So, my question: is this ârealâ behavior? If it is, what are the limitations of trading on it? If it isn't, what causes the illusion? Thanks for your time!