The following special rules are established with respect to the sales factor of the apportionment formula:
Where business income from intangible property cannot readily be attributed to any particular income producing activity of the taxpayer, the income cannot be assigned to the numerator of the sales factor for any state and shall be excluded from the denominator of the sales factor. For example, where business income in the form of dividends received on stock, royalties received on patents or copyrights, or interest received on bonds, debentures or government securities results from the mere holding of the intangible personal property by the taxpayer, the dividends and interest shall be excluded from the denominator of the sales factor.
2.26 Ark. Code R. 51-715