One dollar or less used to be the common threshold for what we call "penny stocks." Today, the SEC has expanded penny stocks to securities that trade for less than $5 a share. Many investors avoid these stocks because they are speculative in nature. Meanwhile, penny stocks often trade infrequently and hold wide bid/ask spreads. These stocks also carry many other traits that, in many cases, cause excessive volatility. With that said, some penny stocks perform incredibly well, which helps them remain attracti ...