All bow strokes that come from the air need the bow hand to give, and thus absorb the impact of landing.
As the bow hold changes shape while absorbing the impact it then needs to reform in the air in preparation for the next landing. Aim to land on the string with an open hand, with curved fingers and not too pronated a bow hold.
During the stroke on the string the fingers straighten slightly, similar to a down-bow collé action. Make sure you recurl the fingers in the air ready for the next stroke.
An example of repeated down-bow chords in the repertoire is found in the ending of "Praeludium and Allegro" by Fritz Kreisler.
Resources - Repertoire