Reducing a Position

Reducing a position means selling part of it, or covering part of a short, without closing it completely. It sits between holding and exiting. Unlike scaling out at planned profit targets, reducing a position is usually a risk decision: the trade is still valid, but something has changed that makes the full size too risky. Done for the right reasons, it protects your account; done out of fear, it simply weakens your results.

Good reasons to reduce#

Poor reasons to reduce#

• A small pullback inside normal noise.
• Fear after reading an opinion online.
• Wanting to lock in "something" when nothing about the trade has changed.
• Reducing winners while holding losers at full size.

Reducing as risk management#

Reducing size is a key lever for keeping overall risk in check:

• Portfolio heat: if total open risk rises above your limit, reduce the weakest or most correlated positions. See Portfolio Heat.
• Concentration: trim positions that have grown into an outsized share of the account. See Concentration Risk.
• Volatility changes: if volatility doubles, halving size keeps risk constant. See Volatility and ATR-Based Sizing.

Reducing vs moving the stop#

Both reduce risk, but differently:

When a trade still needs room but the risk is too high, reducing size is usually better than tightening the stop beyond logical levels.

Making it rule based#

Write down when you reduce:

1. Before scheduled events larger than a set size, reduce by a set fraction.
2. If a position exceeds a set share of the account, trim back to the limit.
3. If portfolio heat exceeds the cap, reduce the newest or weakest position first.
4. In a drawdown beyond a threshold, reduce all position sizes by a set amount.

Rules prevent reducing from becoming an emotional reaction. See Building a Trading Plan.

Common mistakes#

• Reducing on every pullback, which shrinks winners.
• Never reducing, letting positions grow far beyond intended risk.
• Reducing the wrong positions, cutting strong trades instead of weak or correlated ones.

Frequently asked questions#

What does it mean to reduce a position?#

To close part of a position while keeping the rest open, usually to lower risk without abandoning the trade.

When should I reduce my position size?#

Before major events, when a position becomes too large, when volatility rises sharply, when correlated exposure is too high or when the trend shows signs of weakening.

Is reducing a position the same as scaling out?#

They overlap. Scaling out usually happens at planned profit targets; reducing is usually a risk response to changing conditions.

Next, explore the mental side of trading, starting with Discipline.