PHLX Oil Service Sector(SM) OSX
Date Divisor Reason for Change
11/27/2007 3.1968295 Addition: Oceaneering International Inc. (OII)
Deletion: GlobalSantaFe Corporation (GSF)
Price adjustment in RIG due to Plan of Arrangement with GSF
9/28/2007 3.2448968 National Oilwell Varco Inc. (NOV) - 2 for 1 stock split
8/29/2007 3.4897439 Noble Corporation (NE) - 2 for 1 stock split
7/17/2006 3.6792365 Halliburton Companies (HAL) - 2 for 1 stock split
5/8/2006 Old Name: Cooper Cameron Corp. 
New Name: Cameron International Corp. 
4/18/2006 3.8567492 Nabors Industries Ltd. (NBR) - 2 for 1 stock split
4/10/2006 4.0299263 Schlumberger Limited (SLB) - 2 for 1 stock split
2/7/2006 4.3336272 RDC Special Dividend
12/16/2005 4.3348051 Cooper Cameron Corporation (CAM) - 2 for 1 stock split
12/1/2005 4.5585895 Weatherford International, Ltd. (WFT) - 2 for 1 stock split
9/2/2005 4.7541232 BJ Services Company (BJS) - 2 for 1 stock split
8/25/2005 4.9378894 Smith International, Inc. (SII) - 2 for 1 stock split
8/15/2005 5.1431636 Rowan Companies (RDC) - Special cash dividend ($0.25)
3/14/2005 5.1446514 Addition: National Oilwell Varco, Inc. (NOV)
Deletion: Varco International (VRC)
2/7/2005 5.0845355 Rowan Companies (RDC) - Special cash dividend ($0.25)
7/9/2002 5.0864140 Smith International, Inc. (SII) - 2 for 1 stock split
5/10/2002 5.4631192 Transocean Sedco Forex, Inc. (RIG) changes name to Transocean, Inc. (RIG)
5/1/2002 5.4631192 Noble Drilling Corp. (NE) changes name to Noble Corp. (NE)
11/21/2001 5.4631192 Global Marine, Inc. (GLM) is acquired by Santa Fe International Corp. (SDC)
New name of company is GlobalSanta Fe International Corp. (GSF)
Addition GlobalSanta Fe International Corp. (GSF)
Deletion Global Marine, Inc. (GLM)
6/1/2001 5.3752747 BJ Services Company (BJS) has a 2-1 stock split
2/1/2001 5.6718447 R&B Falcon Corp. (FLC) is purchased by Transocean Sedco Forex, Inc. (RIG) 
Addition BJ Services Company (BJS) 
Deletion R&B Falcon Corp. (FLC)
5/31/2000 5.2280645 Varco International (VRC) is purchased by Tuboscope, Inc. (TBI) 
Varco International (VRC) is the new name of the combined company
4/17/2000 5.1734896 Weatherford International, Inc. (WFT) spin-off of Grant Prideco, Inc. (GRP)
(WFT) opens lower due to spin-off adjustment
12/31/1999 5.3496637 (SLB) spins off Sedco Forex, which merges with Transocean Offshore, Inc. (RIG)
New name of company is Transocean Sedco Forex, Inc. (RIG)
2/26/1999 Cooper Cameron Corp (RON) symbol becomes (CAM)
10/1/1998 5.4276650 Dresser Industries (DI) merges with Halliburton Company (HAL)
(DI) replaced with Weatherford International, Inc. (WFT)
Addition Weatherford International, Inc. (WFT)
Deletion Dresser Industries (DI)
1998 Reading & Bates (RB) merges with Falcon Drilling Co. (FLC)
New name of company is R&B Falcon Corp. (FLC)
Addition Nabors Industries, Inc. (NBR)
Deletion Reading & Bates (RB)
10/28/1997 5.8583883 Global Industries Ltd. (GLBL) 2-1 stock split
9/22/1997 6.0172184 Transocean Offshore, Inc. (RIG) 2-1 stock split
7/22/1997 6.4154084 Halliburton Co. (HAL) 2-1 stock split
7/14/1997 7.1352904 Schlumberger Ltd. (SLB) 2-1 stock split
6/13/1997 7.8468708 Cooper Cameron Corporation (RON) 2-1 stock split
2/24/1997 5.5453709 Options begin trading on the OSX
12/31/1996 Starts trading at a value of 75