@jingli:The large up and down swings are due to a couple of factors. First and foremost, this is a a startup company with one product. It is risky and therefore will have high volatility. This isn't GM. Thus, fluctuations that would be small for larger established company are much larger for a startup.Second, FFIE just got more investment. While counter-intuitive this can actually cause a dive. Why? Because people bought into the company expecting more investment, so when the investment actually arrives the stock price has already factored this in. It is sort of like how a stock might rise before a dividend is issued and falls off afterwards. It doesn't mean that the company is less healthy, it just means that a bunch of investors jumped aboard the ship hoping to make a quick buck and then get out