| Date | Open | Close | Volume |
| 2010-03-02 | 46.44 | 45.67 | 36782100 |
| 2010-03-01 | 41.25 | 41.20 | 2950000 |
| 2010-02-26 | 41.21 | 41.17 | 5164800 |
| 2010-02-25 | 41.05 | 41.23 | 11695000 |
| 2010-02-24 | 41.02 | 41.29 | 5275700 |
| 2010-02-23 | 41.11 | 41.05 | 7111700 |
| 2010-02-22 | 41.28 | 41.18 | 3245900 |
| 2010-02-19 | 41.26 | 41.30 | 7610400 |
| 2010-02-18 | 40.82 | 41.30 | 17277700 |
| 2010-02-17 | 40.72 | 40.87 | 19203000 |
| 2010-02-16 | 40.41 | 40.69 | 73481000 |
| 2010-02-12 | 33.81 | 33.25 | 2684900 |
| 2010-02-11 | 33.64 | 34.04 | 1980500 |
| 2010-02-10 | 32.72 | 33.57 | 1797900 |
| 2010-02-09 | 32.09 | 32.82 | 3800200 |
| 2010-02-08 | 32.06 | 31.36 | 1415400 |
| 2010-02-05 | 31.64 | 32.02 | 2534700 |
| 2010-02-04 | 33.09 | 31.71 | 1915800 |
| 2010-02-03 | 33.14 | 33.43 | 972400 |
| 2010-02-02 | 33.02 | 33.16 | 1201400 |
| 2010-02-01 | 31.83 | 32.89 | 2162300 |
| 2010-01-29 | 32.54 | 31.60 | 1585000 |
| 2010-01-28 | 31.67 | 32.40 | 2683300 |
| 2010-01-27 | 32.43 | 31.93 | 2015200 |
| 2010-01-26 | 32.56 | 32.51 | 2045500 |
| 2010-01-25 | 32.85 | 32.69 | 964600 |
| 2010-01-22 | 33.19 | 32.56 | 2841200 |
| 2010-01-21 | 33.24 | 33.25 | 1898300 |
| 2010-01-20 | 33.80 | 33.30 | 1715000 |
| 2010-01-19 | 33.57 | 34.11 | 3939700 |
| 2010-01-15 | 31.96 | 33.57 | 9469200 |
| 2010-01-14 | 32.60 | 32.66 | 4137000 |
Other Companies: 07-06-2007 | BlackRock Investment Quality Municipal Income Trust | 01-11-2008-1
BlackRock Kelso Capital Corporation | 01-27-2007 | Thomson S.A.