This is going to vary from broker to broker. The OCC does not require "initial" and "maintenance" for PMA. This is a term your current broker is using. The OCC only calculates your OCC PM requirement after the close. Then your broker will have their own house requirement either live or overnight. Lightspeed introduces business to Wedbush Securities. For the overnight requirement, we start with the OCC requirement, then there are house add-ons. The house add-ons are from symbols Wedbush or Lightspeed do not want to offer full leverage on overnight. Once that is added, for accounts under $5mm, we then add 20% for overnight risk. On our web portal, we offer a risk system call Sterling Risk Monitor (SRM). It shows a live estimate of current OCC and House requirements. The house requirement is based on a file we get from Wedbush including expected PM add-ons. That way you can view which symbols have a higher requirement. For a Reg-T account, the process is very simple while using Lightspeed Trader, as the Market Maker window clearly displays how marginable a symbol is. E.G., 25%, 50%, 100% etc. These are often clues toward symbols in a PMA, but the file is not the same.