Item 13. (b)

CERTIFICATION UNDER SECTION 906 OF SARBANES-OXLEY ACT OF 2002
Name of Issuer: T. Rowe Price U.S. Limited Duration TIPS Index Fund
In connection with the Report on Form N-CSR for the above named Issuer, the undersigned hereby certifies, to the best of his knowledge, that:
1.	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934;
2.	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Issuer.

Date:	January 18, 2022	/s/ David Oestreicher
		David Oestreicher
		Principal Executive Officer
Date:	January 18, 2022	/s/ Alan S. Dupski
		Alan S. Dupski
		Principal Financial Officer