Position sizing: do not go all in

The fastest way to turn a decent investment into a family emergency is to make it too large.

That is position sizing: deciding how much one opportunity is allowed to matter. The pitch wants to discuss how well the deal could go. Your job is to decide what happens at home if it does not.

Size is not a verdict on quality

Position sizing measures one investment against your entire financial life. It should account for liquid net worth, income stability, debt, emergency reserves, taxes, family obligations, and the possibility that capital returns late or never.

You can trust the sponsor, like the market, and understand the plan. Size it anyway. A healthy tree can still crack the foundation when you plant it three feet from the house.

Loss is not the only failure

Investors hear “risk” and picture a permanent loss. Lockup matters too. Money can remain invested for years while a job disappears, a medical bill arrives, or the property asks for more capital.

If losing or merely locking the check would change how your household lives, the position is probably too large. The investment does not have to fail for the sizing decision to hurt.

When the minimum exceeds the maximum

Consider an investor with $300,000 of liquid savings who wants to put $100,000 into one private deal because the pitch feels unusually strong.

That is one-third of available liquidity locked for years. If a job loss, medical cost, or capital call arrives, the projected return cannot pay the electric bill. This is an illustration, not a recommended allocation or prediction. Its lesson is simply that deal quality and household fit are separate decisions.

Read the clauses that can reach back

Check:

• the minimum investment and expected hold period;
• capital-call provisions and distribution uncertainty;
• debt maturity and tax timing;
• your cash reserve after the wire;
• existing concentration by sponsor and market.

A “small” check can become large when it feeds the same exposure already taking up the garden bed.

Write the maximum in a quiet room

Set your maximum single-deal percentage before opening the next offering. Use money left after emergency reserves and known obligations, not the largest net-worth number you can defend.

Then enforce the limit cold. If the offering minimum exceeds it, you do not need more confidence. You need to pass. The right seed, planted at the wrong scale, can still crowd out everything your family needed to grow.