Another interesting way I have found to look at it is «effective yield» on original investment. (dividendmantra.com)
However, if the markets succumb to gravity (finally), it protects your portfolio from loss of original investment (I hope I understood it right). (unovest.co)
You still own 166.6667 shares worth $ 2000 as of today in which you have a basis (original investment amount that will not be taxed upon withdrawal) of $ 1,666.67. (money.stackexchange.com)