Some food for thought . . . . 
 
Estimated weight of the components in the S&P 500 = 9%(Mid-June 2005)
 
Energy companies in this Index primarily develop and produce crude oil and natural gas, and provide drilling and other energy-related services. 
 
Components :
| Exxon Mobil Corp. | 
XOM | 
| Chevron Corp. | 
CVX | 
| CONOCOPHILLIPS | 
COP | 
| Occidental Petroleum Corp. | 
OXY | 
| Devon Energy Corp. | 
DVN | 
| Halliburton Co. | 
HAL | 
| Schlumberger Ltd. | 
SLB | 
| Burlington Resources Inc. | 
BR | 
| Apache Corp. | 
APA | 
| Transocean Inc. | 
RIG | 
| EOG Resources Inc. | 
EOG | 
| Marathon Oil Corp. | 
MRO | 
| Anadarko Petroleum Corp. | 
APC | 
| Unocal Corp. | 
UCL | 
| Baker Hughes Inc. | 
BHI | 
| Kerr-McGee Corp. | 
KMG | 
| Amerada Hess Corp. | 
AHC | 
| Noble Corp. | 
NE | 
| Valero Energy Corp. | 
VLO | 
| Sunoco Inc. | 
SUN | 
| Nabors Industries Ltd. | 
NBR | 
| BJ Services Co. | 
BJS | 
| Ashland Inc. | 
ASH | 
| Rowan Cos. Inc. | 
RDC | 
| XTO Energy Inc. | 
XTO | 
| Williams Cos. | 
WMB | 
| Kinder Morgan Inc. | 
KMI | 
| National Oilwell Varco Inc. | 
NOV | 
| El Paso Corp. | 
EP |