Harlan F. Stone,
International Shoe Company v. Shartel…
“ Although it directs that the tax be ascertained by assigning a specific value to the nonpar stock, and applying to it the rate applicable to par value stock, the resultant inequalities do not differ from those complained of in that case where the tax was computed at a flat rate on nonpar stock, used in the state, without assigning to it any value.The assignment to the shares of a value in excess of their present worth or of the present value of the assets within the state does not operate to tax property or business without the state. The tax is a privilege and not a property tax. ”
