The term "penny stocks," also known as micro-cap equities, micro caps, small caps, pink sheets, refers to shares in a company that trades for less than $5.00. Most penny stocks trade on the OTCBB market and the pink sheet electronic quotation service. Penny Stocks can be very volatile and can see gains as much as 500% in a day. Volatility in penny stocks is also dangerous because penny stocks can come down as quickly as they go up. If you trade penny stocks based on stock picks, make sure to always do your due diligence on the companies you're considering, use stop loss orders, and book your profits when you are in a position to do so.