C-CPI-U automobile component
(7) Automobile price inflation adjustment (A) In general In the case of any passenger automobile placed in service after 2018, subsection (a) shall be applied by increasing each dollar amount contained in such subsection by the automobile price inflation adjustment for the calendar year in which such automobile is placed in service. Any increase under the preceding sentence shall be rounded to the nearest multiple of $100 (or if the increase is a multiple of $50, such increase shall be increased to the next higher multiple of $100). (B) Automobile price inflation adjustment For purposes of this paragraph— (i) In general The automobile price inflation adjustment for any calendar year is the percentage (if any) by which— (I) the C-CPI-U automobile component for October of the preceding calendar year, exceeds (II) the automobile component of the CPI (as defined in section 1(f)(4)) for October of 2017, multiplied by the amount determined under 1(f)(3)(B). (ii) C-CPI-U automobile component The term “C-CPI-U automobile component” means the automobile component of the Chained Consumer Price Index for All Urban Consumers (as described in section 1(f)(6)).