What is Stock split?
Also known as: share split
An operation in which a joint-stock company reduces the face value of each share and increases the number of shares in proportion. Under paragraph 345 of NAS No. 21 it is used to increase the liquidity of shares; since the amount of shareholders' capital does not change, no journal entry is made for this operation, and the change is recorded in the analytical registers opened for account 8310 "Ordinary shares". Each shareholder's stake does not change either: they have more shares, each with a lower face value. The difference from issuing new shares is that a split brings in no new money and does not reduce existing shareholders' stakes.
Source: 21-son BHMS, 345-band; Investor.gov (AQSh SEC): stock split