That Last 20% Was Never Yours to Keep

The tax trend followers pay for riding the big move. Stop fighting it — it’s cost of doing business.

Before you start gloating about that open position. The mark-to-market number on your screen? Subtract 20 to 30 percent. That’s the real number. The rest is rented glory.

This is the first law of trend following. You do not capture the full move. You never capture the full move. The market does not ring a bell at the top, hand you a cheque, and send you on your way. The reversal always comes before you can act. That gap — between the high-water mark and where your trailing stop finally triggers — that gap is the toll booth on the highway of fat tails.

“You don’t get paid to be right about the direction. You get paid to survive long enough to hold through the full extension.”

The arithmetic of giving it back

Say you’re sitting on a 50% winner. Your trailing stop is set properly — wide enough to breathe, tight enough to mean something. The market does what markets do: it exhausts itself, reverses hard, tags your stop. You’re out at 35%. You just “gave back” 15 points. Your WhatsApp group calls it a mistake. It was not a mistake. It was the fee.

this is the cost of convexity. You’re long optionality — you’re positioned to participate in the rare, explosive, asymmetric move that makes the entire strategy viable. The premium you pay for that optionality is not just the small losses that pile up while you wait. It’s also the final drawdown from peak before exit. Both are part of the same package. You cannot unbundle them.

The ego trap

Here is where most of us get it wrong. We see the big mark-to-market. The dopamine hits. We start calculating net worth on a napkin. We tighten the stop. We move to a shorter timeframe. We tell ourselves we’re being “disciplined” and “locking in gains.” What we’re actually doing is introducing discretion into a systematic process — and discretion, in this context, is a synonym for fear dressed up in rational clothing.

The sequence of self-sabotage

Position goes up 40%
→ Brain computes future wealth
→ Tightens trailing stop “just a little”
→ Gets stopped out on a 3-day pullback
→ Watches in horror as trade continues to +100%
→ Concludes trend following doesn’t work

The trailing stop is not a profit protection tool. It is a position management tool. Its job is to keep you in the trade when you’re right and get you out only when the primary trend has demonstrably broken. If you’re adjusting it based on your psychological comfort with the open P&L, you have converted a mechanical edge into an emotional lottery.

What Turtle traders actually understood.

The original Turtle traders — Richards Dennis’s experiment in the 1980s — were explicitly told not to think about open profits. The position was the position. The system was the system. You followed it or you didn’t. The ones who couldn’t resist “helping” the system underperformed the ones who sat on their hands and let the rules run.

Because the entire P&L of a trend-following strategy comes from a handful of extreme moves per year. Miss one of those because you tightened your stop prematurely, and you’ve potentially wiped out six months of returns in a single bad decision. The math is brutally unforgiving: the expected value of “outsmarting” your trailing stop is negative. Every time. In aggregate.

“The 20% you’re trying to protect is the same 20% that, when you fail to hold through it, costs you the other 80%.”

Cost of doing business — full stop

A dentist pays for equipment. A restaurateur pays for spoilage. A reinsurer pays claims that were always going to come. A trend follower gives back 20 to 30 percent of the open position when the move finally exhausts. This is not bad luck. This is not a fixable problem. (booking half is one legitimate way). This is the structural reality of capturing fat-tailed returns.

The moment you accept this — truly accept it, not just intellectually but in your bones, not reacting when you’re watching the position reverse — the moment you internalize it as a fee and not a failure, you become a different kind of trader.

The big M2M is exciting. Enjoy it. Just don’t let it make you stupid. You’re going to give 20 to 30 percent of it back. Write it down right now, subtract it from the number, and act accordingly.

The trailing stop is your only friend here. Don’t touch it.

#brotip · #trendfollowing · #riskmanagement · #trading