https://www.spglobal.com/spdji/en/documents/indexnews/announcements/20211101-1444761/1444761_djiaibmspinnov2021.pdf
IBM To Remain In Dow Jones Industrial Average After Spin-Off Transaction
https://www.spglobal.com/spdji/en/documents/indexnews/announcements/20211101-1444761/1444761_djiaibmspinnov2021.pdf