| Index Components as of: 02/08/10 |  | |
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| Company Name | Symbol | % Weighting |
|---|---|---|
| Williams Cos | WMB | 8.15% |
| Devon Energy | DVN | 7.54% |
| Chesapeake Energy | CHK | 7.42% |
| Continental Resources Inc/OK | CLR | 6.37% |
| ONEOK Partners LP | OKS | 5.55% |
| Williams Partners L.P. | WPZ | 5.15% |
| Magellan Midstream Partners L.P. | MMP | 4.74% |
| Unit Corp | UNT | 4.62% |
| Alliance Holdings GP LP | AHGP | 4.51% |
| Oneok Inc | OKE | 4.43% |
| Bok Financial | BOKF | 4.36% |
| Helmerich & Payne | HP | 4.34% |
| Oge Energy | OGE | 4.33% |
| ARENA RESOURCES INC | ARD | 3.96% |
| Alliance Resource Partners L.P. | ARLP | 3.88% |
| SandRidge Energy Inc | SD | 3.85% |
| Williams Pipeline Partners LP | WMZ | 2.97% |
| Dollar Thrifty Automotive Group Inc | DTG | 2.27% |
| Bancfirst Corp | BANF | 1.92% |
| Sonic Corp | SONC | 1.65% |
| Pre-Paid Legal Svcs | PPD | 1.45% |
| Gulfport Energy | GPOR | 1.36% |
| Aaon Inc | AAON | 1.17% |
| GMX Resources Inc. | GMXR | 1.02% |
| LSB Industries Inc | LXU | 0.92% |
| Matrix Service Co | MTRX | 0.81% |
| Orchids Paper Products Inc. | TIS | 0.45% |
| Bronco Drilling Co. Inc. | BRNC | 0.44% |
| Southwest Bancorp Inc/Stillwater OK | OKSB | 0.36% |
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