Knight Capital (NYSE:KCG) has released its quarterly earnings, and in this video, Motley Fool financial analyst Matt Koppenheffer discusses the company's painful drop in tangible book value over the past couple of years. He highlights the one major error that the company made that cost it dearly and brought it very near bankruptcy, and he sees it as a healthy positive for society that it was the private market, not a government bailout, that brought the company back from the brink.

Matt Koppenheffer and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.