EXHIBIT 12(b) I, James Ross, President and Principal Executive Officer, and I, Gary L. French, Treasurer and Principal Financial Officer, of streetTRACKS(R) Index Shares Funds (the "Trust") each certify that: 1. This Form N-CSR filing for the Trust (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Trust. By: /s/ James Ross ----------------------------------------- James Ross President and Principal Executive Officer Date: November 20, 2006 By: /s/ Gary L. French ----------------------------------------- Gary L. French President and Principal Financial Officer Date: November 20, 2006