⏱ 1-Minute Summary A cash account lets you trade only with your own money; a margin account lets you borrow buying power for leverage. Covered calls and cash-secured puts work in a cash account; naked shorts, iron condors, and spreads need margin. Margin adds leverage, and the risks of margin calls and forced liquidation.
1. Cash vs Margin; The Basics
- Cash account: every trade must be fully funded by settled cash. No borrowing, no leverage.
- Margin account: your securities serve as collateral, letting you borrow buying power. You can trade with more than you deposited.
The core trade-off: margin gives flexibility and leverage, but adds interest, risk, and obligations that a cash account never has.
2. What You Can Do in Each Account
| Cash account | Margin account | |
|---|---|---|
| Buy stocks / ETFs | Yes (fully paid) | Yes (with leverage) |
| Covered call | Yes | Yes |
| Cash-secured put | Yes | Yes |
| Naked short option | No | Yes (if approved) |
| Credit spreads / iron condors | No | Yes (if approved) |
| Borrowing / leverage | No | Yes |
3. Buying Power and Margin Requirements
- Buying power is the maximum value you can put to work. In cash, it is your settled cash; in margin, it is cash plus borrowing capacity.
- Margin requirements define the collateral needed for a position. For example, a cash-secured put (1 short put) requires cash collateral equal to the cost of 100 shares at that strike (strike × 100).
- Maintenance margin is the minimum equity you must keep; if your equity drops below it, the broker will issue a margin call or close positions.
4. Selling Options: The Key Difference
The account type decides which premium-selling strategies are available:
- Cash account: covered calls (stock-backed) and cash-secured puts (cash-backed). The position is fully funded, so there is no forced-liquidation risk from price moves.
- Margin account: you can sell naked options and build spreads and iron condors. These use margin as collateral and can be liquidated if the account drops below maintenance.
Before selling anything, check which account type your broker requires for that specific strategy.
5. Risks of Margin
- Margin call: if equity falls below maintenance, the broker demands funds or you must close positions.
- Forced liquidation: if you cannot meet the call, positions are sold at the broker's discretion, often at bad prices.
- Interest: borrowed buying power accrues interest, which reduces net returns.
- Amplified losses: leverage magnifies both gains and losses.
6. Choosing the Right Account
- Start with a cash account if you sell covered calls or cash-secured puts and want no leverage risk.
- Consider margin only when you need naked shorts or spreads, understand the requirements, and can tolerate the liquidation risk.
- Never open margin just to trade bigger; understand the obligations first.
⚠️ Platform Data Boundary: This article explains account-type concepts. The platform's backtests model closing-price settlement and account mechanics for long-term, daily-frequency research. Actual margin, interest, and liquidation rules are set by your broker and vary by account type.
⚠️ Research Use Only: This article is educational. Margin trading involves substantial risk, including margin calls and forced liquidation. Nothing here is a buy or sell signal. Use this platform's backtests as historical statistical reference only.