S.C. Code Ann. § 33-39-60

The corporation shall not be subject to any taxes based upon or measured by income which are now or may be hereafter levied by the State; and the securities, evidences of indebtedness and shares of the capital stock issued by the corporation established under the provisions of this chapter, their transfer, income therefrom and deposits of financial institutions invested therein shall at all times be free from taxation within the State.