Modeling portfolios for actively managed exchange traded funds

1. A process for creating a modeling portfolio to model an actively managed exchange traded fund portfolio comprising:

(a) selecting the identifies and weights of a first set of securities to create a first portfolio of securities;

(b) receiving the identifies of a second set of securities;

(c) calculating a set of risk factors for the actively managed exchange traded fund, wherein the risk factors are calculated on a computer programmed to perform factor analysis;

(d) calculating a set of weights for the second set of securities to create a supplemental portfolio of securities, wherein the set of weights for the second set of securities is calculated on a computer programmed to perform factor analysis;

wherein the combination of the first portfolio of securities and the supplemental portfolio of securities creates the modeling portfolio, which substantially tracks the actively managed exchange traded fund portfolio over a period of time; and

wherein the modeling portfolio does not reveal the actively managed exchange traded fund portfolio.

2. The process of claim 1 , wherein the factor analysis is a principal components analysis.

3. The process of claim 2 , wherein the period of time is one trading day.

4. The process of claim 3 , wherein step (c) is performed each trading day.

5. The process of claim 1 , wherein the first portfolio of securities is a creation basket.

6. The process of claim 1 , wherein the first portfolio of securities is a redemption basket.

7. The process of claim 4 , wherein the first portfolio of securities is a creation basket.

8. The process of claim 4 , wherein the first portfolio of securities is a redemption basket.

9. The process of claim 1 , wherein the first portfolio of securities is a creation basket.

10. The process of claim 1 , wherein the first portfolio of securities is a redemption basket.

11. A computer-readable product containing a computer program for creating a modeling portfolio to model an actively managed exchange traded fund portfolio, the computer program having instructions for causing a computer to:

(a) select the identities and weights of a first set of securities to create a first portfolio of securities;

(b) receive the identities of a second set of securities;

(c) calculate a set of risk factors for the actively managed exchange traded fund, wherein the risk factors are calculated on a computer programmed to perform factor analysis;

(d) calculate a set of weights for the second set of securities to create a supplemental portfolio of securities, wherein the set of weights for the second set of securities is calculated on a computer programmed to perform factor analysis;

wherein the combination of the first portfolio of securities and the supplemental portfolio of securities creates the modeling portfolio, which substantially tracks the actively managed exchange traded fund portfolio over a period of time; and

wherein the modeling portfolio does not reveal the actively managed exchange traded fund portfolio.

12. The computer-readable product of claim 11 , wherein the factor analysis is a principal components analysis.

13. The process of claim 12 , wherein the period of time is one trading day.

14. The process of claim 13 , wherein step (c) is performed each trading day.

15. The process of claim 11 , wherein the first portfolio of securities is a creation basket.

16. The process of claim 11 , wherein the first portfolio of securities is a redemption basket.

17. The process of claim 14 , wherein the first portfolio of securities is a creation basket.

18. The process of claim 14 , wherein the first portfolio of securities is a redemption basket.

19. The process of claim 11 , wherein the first portfolio of securities is a creation basket.

20. The process of claim 11 , wherein the first portfolio of securities is a redemption basket.