Upasaka, those interested,
Sakka = honour/fall for - kāya = group , this giving into, falling for, uphold, starts very outwardly, such as group-identifications, nationality, gender, family, kind, buddhist...we, my, my land, my skill... goes further and deeper to ones body, deeper to the five aggregates. Penetrating here, able to "disconnect" nama-rupa, the stream beginns. Yet, to penetrate the subtile areas, merely in spheres of nama, fine-material-identification, a-rupa-identifications, will need another three turns of the path-wheel.
One can also divide as Sakka -aya, aya meaning 'income', relaying on a group, trade, so "still after amassing" and not on the way of abounding, letting go, letting go of what is not really ones own.
One having entered the stream is said to have become independent (for further walk along).
Again here: First Things First, leaving home/stand, purify one silas. Useless to work on refined polishing a chair, cratching on the bark, if the tree stands firm in the forest. From outwardly letting off, rupa... to the fine, all based on Sila, those shares.
(Note that this is not given for trade, exchanges, stacks or entertainment, but as a means to escape this wheel)