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I’ve been trading since the ’80s, and I’ve seen people blow up accounts more times than I can count. Almost every time, leverage was the accelerant that turned a bad situation into a disaster.
So when I say portfolio margin is one of the most dangerous gifts a broker can hand you, it’s coming from experience. It looks like an opportunity on the surface, but it can get out of control fast if you’re not careful.
Charles Schwab hands it out like it’s a perk — eight-to-one leverage, maybe even higher. I don’t even want to know the exact number because it’s that extreme, and thinking about it the wrong way can get you into trouble quickly.
If you don’t know what you’re doing, portfolio margin will bury you. The moment you start treating it like free money, you’re one bad week away from a margin call that wipes out months or years of progress.
It’s like handing someone the keys to a Ferrari when they just got their learner’s permit — sure, you can floor it, but that doesn’t mean you should.
The Old-School Solution
So I don’t rely on what my broker shows me, and I definitely don’t trust the account balance at face value. That number is inflated by leverage I have no intention of using, and treating it as real capital is where people get into trouble.
Instead, I use a simple notebook and track everything by hand — no spreadsheets, no apps, just a pen and a running ledger. It’s basic, but it forces me to stay honest about what I’ve actually committed.
What I care about is my real exposure in cash-secured puts, not what the margin account says I can do. That distinction alone keeps me from drifting into trades I shouldn’t be in.
Do the Accounting Like It’s Cash
Let’s say I’m selling a cash-secured put on a stock trading at $250. If I were fully securing it, that’s $25,000 tied up — real capital at risk.
With margin, though, I might only need around $4,000 to put that trade on. That’s where margin can be useful — not for increasing risk, but for improving capital efficiency if you stay disciplined.
The problem is your broker doesn’t think that way. The platform shows buying power based on maximum margin and makes it feel like you’ve got room for a bunch of additional trades.
That’s the trap, and it’s an easy one to fall into if you’re not careful.
How I Keep Myself Out of Trouble
So here’s my rule — I treat every trade like it’s fully cash-secured, even if I’m using margin. I write down the full notional exposure and track it manually so I always know where I really stand.
Because once you start believing the buying power number on your screen, you’re playing a different game. That’s the broker’s game, and it usually ends the same way — too much exposure, one bad stretch, then a margin call.
I’ve seen that cycle enough times to respect it. It starts small, then snowballs quickly, and before you know it, the account is in trouble.
Portfolio margin is a tool, not a strategy. If you treat it like a strategy, it will absolutely bury you.
So yeah — I still use a notebook. It’s slower, it’s old-school, and it’s probably saved me more money than any trade alert I’ve ever sent.
Trade well,
Jack Carter
Jack Carter Trading
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*This is for informational and educational purposes only. There is inherent risk in trading, so trade at your own risk.
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Disclaimer: We develop tools and strategies to the best of our ability, but we can’t guarantee the future. There is always a risk of loss when trading. Past performance is not indicative of future results. On live trades, the result is a 78% win rate from 4/05/23 through 2/20/26, with an average return per trade (winners and losers included) of 19.88%, a 6-day average hold time, and an average winner of 52.76%.
