Just posted the following info in my journal:
Avoiding Cash Account Trading Violations
If you plan to trade strictly on a cash basis, there are 3 types of potential violations you should aim to avoid: good faith violation, freeriding violation, and cash liquidation violation.
Summary of the Settlement Rules:
Settlement time for cash transfer to the account is 2 days, called T+2.
Settlement time for stock trade is 2 days, called T+2.
Settlement time for option trade is 1 day, called T+1.
You may open a position with unsettled cash, but
- for a long position: the money required for the purchase must first be settled before the position can be closed.
- for a short position: the money one receives (called credit) at opening must first be settled before the position can be closed.
Otherwise you commit a violation. The trading system does not prevent you from, nor inform you of, making such violations...
That means: a violation mostly occurs if one closes a position before its opening side was settled.
Holding the position >= the settlement time avoids violations (applies only to unsettled cash, not to settled cash).
Just my Q&D interpretation and summary.
For details and examples see this page and this page.
Comments & corrections & improvements welcome.
