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The Standard & Poor's/Investortools - Public Power Index
October 2011
(Expanded Deletion Criteria)
See Explanation
Cumulative Returns Data

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Period # Of
Cusips		 Total
Return		 Beg. Mkt.
Val (Mil)		 Mkt. Wt.
Coupon 		Mkt. Wt.
Beginning Yield		 Mkt. Wt.
Ending Yield		 Ending Mod
Duration		 Ending Yrs. To
Price Date
October 2011 2,456 -0.361% 72,440 4.972% 2.794% 2.925% 4.53 5.60
One Year History
(Indices and data produced before November 2002 reflect the original limited deletion criteria.)
Period # Of
Cusips		 Total
Return		 Beg. Mkt.
Val (Mil)		 Mkt. Wt.
Coupon 		Mkt. Wt.
Beginning Yield		 Mkt. Wt.
Ending Yield		 Ending Mod
Duration		 Ending Yrs. To
Price Date
Sep 2011 2,402 0.808% 71,032 4.977% 2.852% 2.784% 4.49 5.48
Aug 2011 2,360 1.498% 68,571 4.980% 3.115% 2.861% 4.74 6.06
Jul 2011 2,357 0.967% 69,043 4.987% 3.241% 3.104% 5.07 6.78
Jun 2011 2,348 0.258% 69,369 4.996% 3.207% 3.206% 5.15 7.14
May 2011 2,325 1.844% 67,985 4.995% 3.447% 3.204% 5.22 7.25
Apr 2011 2,344 1.856% 68,659 5.014% 3.693% 3.454% 5.67 8.39
Mar 2011 2,309 -0.320% 67,863 5.013% 3.617% 3.681% 6.22 9.61
Feb 2011 2,295 1.481% 65,638 5.006% 3.794% 3.621% 6.24 9.49
Jan 2011 2,328 -0.758% 68,456 5.021% 3.627% 3.751% 6.58 10.24
Dec 2010 2,335 -1.835% 70,275 5.024% 3.290% 3.631% 6.27 9.65
Nov 2010 2,288 -1.790% 71,005 5.023% 2.936% 3.285% 5.48 7.73
Oct 2010 2,232 -0.343% 69,696 5.048% 2.854% 2.942% 4.84 6.16
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