Definitive Materials Filed by Investment Companies. (497)

Short Duration Inflation Protection Bond Fund

February 7, 2014

EXPLANATORY NOTE

On behalf of the Short Duration Inflation Protection Bond Fund, a series of American Century Investment Trust (the “Trust”), and pursuant to Rule 497(e) under the Securities Act of 1933, as amended (the “Securities Act”), the purpose of this filing is to submit an interactive data file in the manner provided by Rule 405 of Regulation S-T and General Instruction C.3.(g) of Form N-1A. The interactive data file included as an exhibit to this filing relates to the revised prospectus filed with the Securities and Exchange Commission on behalf of the Trust pursuant to Rule 497(e) under the Securities Act on January 23, 2014; such filing (Accession Number 0001437749-14-000942) is incorporated by reference into this Rule 497 Document.

EXHIBIT INDEX

EXHIBIT NUMBER	DESCRIPTION OF DOCUMENT

Exhibit – 101.INS	XBRL Instance Document

Exhibit – 101.SCH	XBRL Taxonomy Extension Schema Document

Exhibit – 101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

Exhibit – 101.LAB	XBRL Taxonomy Extension Label Linkbase Document

Exhibit – 101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document