Cellular Biomedicine Group Inc (CBMG)

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very low volume has enabled the market makers to keep the spread between bid and ask very wide-----a wide spread means they make a lot of profit by trading at the low end of the range----just a few buyers would force them to go the other way to keep making their profit------buyers would of course have to keep their bids above that of the market maker or you are just making it easier for him to get his shares at the low and then sell at the high----the profit he makes is his legitimate reward for his risk of being a market maker