ASST options (on Robinhood) were trading in 0.05c increments a couple weeks ago when I picked up some calls at 0.05c, the minimum price. Then, during a downturn, all of a sudden options were being marked at 0.03, 0.04, 0.06, 0.07 etc. At this time, orders can now be made at any price.
Who determines the 0.05c limitation? Is it the broker? When does it switch and why?