Events like stock splits or changes inside the list of your companies composing the index alter the sum in the component prices. In these cases, in order to stop discontinuity inside the index, the Dow Divisor is updated so that the quotations right before and once the function coincide: https://financefeeds.com/bitcoin-holds-support-as-skyren-dao-offers-blockdag-and-lightchain-ai-holders-free-airdrop/