| Date | Open | Close | Volume |
| 2010-03-03 | 12.72 | 12.57 | 228400 |
| 2010-03-02 | 12.86 | 12.73 | 285000 |
| 2010-03-01 | 13.09 | 13.00 | 370800 |
| 2010-02-26 | 13.35 | 12.97 | 392100 |
| 2010-02-25 | 13.05 | 13.16 | 270700 |
| 2010-02-24 | 13.14 | 13.23 | 426500 |
| 2010-02-23 | 13.02 | 13.08 | 224600 |
| 2010-02-22 | 13.11 | 13.00 | 293400 |
| 2010-02-19 | 12.92 | 13.06 | 276000 |
| 2010-02-18 | 12.84 | 12.90 | 236100 |
| 2010-02-17 | 12.89 | 12.81 | 218800 |
| 2010-02-16 | 12.65 | 12.87 | 393600 |
| 2010-02-12 | 12.15 | 12.50 | 248800 |
| 2010-02-11 | 11.90 | 12.30 | 284300 |
| 2010-02-10 | 11.94 | 11.97 | 246700 |
| 2010-02-09 | 12.00 | 11.97 | 352400 |
| 2010-02-08 | 12.18 | 11.81 | 395400 |
| 2010-02-05 | 12.20 | 12.40 | 424100 |
| 2010-02-04 | 12.50 | 12.20 | 582100 |
| 2010-02-03 | 12.87 | 12.58 | 347500 |
| 2010-02-02 | 12.82 | 12.91 | 385000 |
| 2010-02-01 | 12.64 | 12.84 | 423900 |
| 2010-01-29 | 12.58 | 12.56 | 511400 |
| 2010-01-28 | 12.54 | 12.50 | 497200 |
| 2010-01-27 | 12.18 | 12.47 | 278200 |
| 2010-01-26 | 12.41 | 12.31 | 229100 |
| 2010-01-25 | 12.66 | 12.55 | 378600 |
| 2010-01-22 | 12.77 | 12.58 | 566300 |
| 2010-01-21 | 13.19 | 12.82 | 490800 |
| 2010-01-20 | 13.00 | 13.12 | 346100 |
| 2010-01-19 | 13.48 | 13.25 | 830400 |
| 2010-01-15 | 13.55 | 13.41 | 461600 |
Other Companies: 11-09-2009 | iShares Dow Jones US Medical Devices | 11-13-2009-1
Tongxin International, Ltd. | 02-17-2007-1 | MDC Holdings Inc.