The new $15B authorization starts 8/1/22; the $1.4B remaining on the existing buyback authorization will presumably be used up by then.
Hypothetically, if the entire buyback authorization were used to buy shares at the current share price, the number of shares outstanding would be reduced about 14%.
p.s. CAT is holding an Investor Day webcast today.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”