After an incredible run-up this year, the broader market trend was downward this week, to the tune of 1.6%, but some of the stocks out there were hit particularly hard. In this video, Motley Fool financial analysts Matt Koppenheffer and David Hanson take a look at what was behind three big dives this week: National Bank of Greece (NYSE:NBG)Newcastle Investment (NYSE:NCT), and American Capital Mortgage Investment (NASDAQ:MTGE)

David Hanson has no position in any stocks mentioned. Matt Koppenheffer has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not 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.