Minn. Stat. § 290.0136: CERTAIN PREFERRED STOCK LOSSES.

A taxpayer must compute net income by treating losses from the sale or transfer of certain preferred stock, which the taxpayer treated as ordinary losses pursuant to Division A, title III, section 301 of Public Law 110-343, as capital losses. The amount of net income under section 290.01, subdivision 19; taxable net income under section 290.01, subdivision 22; taxable income under section 290.01, subdivision 29; the numerator and denominator in section 290.06, subdivision 2c, paragraph (e); individual alternative minimum taxable income under section 290.091, subdivision 2; corporate alternative minimum taxable income under section 290.0921, subdivision 3; and net operating losses under section 290.095 must be computed for each taxable year as if those losses had been treated by the taxpayer as capital losses under the Internal Revenue Code, including the limitations under section 1211 of the Internal Revenue Code.