Indiana Code Title 6. Taxation § 6-5.5-4-2

(1) “Receipts” means gross income (as defined in IC 6-5.5-1-10), plus the gross income excluded under Section 103 of the Internal Revenue Code, less gross income derived from sources outside the United States.  However, upon the disposition of assets such as securities and money market transactions, when derived from transactions and activities in the regular course of the taxpayer's trade or business, receipts are limited to the gain (as defined in Section 1001 of the Internal Revenue Code) that is recognized upon the disposition.

(2) “Money market instruments” means federal funds sold and securities purchased under agreements to resell, commercial paper, banker's acceptances, and purchased certificates of deposit and similar instruments.

(3) “Securities” means United States Treasury securities, obligations of United States government agencies and corporations, obligations of state and political subdivisions, corporate stock and other securities, participations in securities backed by mortgages held by United States or state government agencies, loan backed securities and similar investments.