There are 100 shares in the market
I have $100 in cash, and $100 of Assets.
My Company is worth $200
If I pay a $1 ps dividend, then the share price should halve, and the share owners get $1 each.
If I buy back 50 shares, at $2 each, there will be 50 shares left at a value of $2 each. But now my earnings/share goes up as if by magic, and my options are worth more than in the dividend case.
Also capgains vs income tax yada yada