Costs
Swing pricing makes other people's trading your cost
Funds can adjust their dealing price to load trading costs onto the investors causing them, which means what you pay depends partly on what everyone else is doing.
The price at which a fund deals is not always a straightforward calculation of what it holds. Many funds adjust it, and the adjustment reflects other investors' behaviour rather than yours.
The problem the adjustment solves
When money flows into a fund it must be invested, and doing so costs money in spreads and transaction charges. Those costs fall on the fund, meaning on everyone already holding it.
Without an adjustment, existing investors subsidise arrivals and departures. Somebody who never trades pays a share of the costs generated by those who do.
Over time that dilution is a real transfer of value. Funds with heavy flows would otherwise steadily leak returns from long-term holders to short-term ones.
How the mechanism works
On a day of substantial net inflow, the dealing price is moved up so that buyers pay something closer to the true cost of establishing their position.
On a day of substantial net outflow the price moves down, so sellers bear the cost of the selling their exit requires. The direction follows the net flow, not the individual order.
Most funds apply this only when flows exceed a threshold, since making a small adjustment daily would add noise without protecting anyone meaningfully.
The consequence for an individual
Your dealing price depends on what other investors did that day. Buying on a heavy inflow day costs more than buying the same fund on a quiet one.
This is invisible in the statement. What appears is a price, with nothing indicating whether an adjustment was applied or how large it was.
The effect can also work in your favour. Buying on a day of heavy outflows means acquiring at an adjusted-down price, which is a benefit nobody notices either.
Why it is not a charge
The adjustment is not revenue for the manager. It stays inside the fund and offsets the transaction costs the flows generated, which is why it is not listed among the charges.
It is nonetheless a real cost to whoever deals on an adjusted day. Excluding it from charge tables makes those tables incomplete rather than inaccurate.
Details of the policy, including thresholds and maximum adjustments, sit in fund documentation. Practice and disclosure requirements vary by jurisdiction and change over time.
What follows for a regular contributor
Someone contributing monthly deals on many different days across many different flow conditions. The adjustments encountered are effectively random and average out over years.
Someone dealing rarely and in size is more exposed, because a single adjustment applies to the whole amount with no opportunity for it to average away.
The mechanism also quietly penalises reacting to events. Days when many investors want out are exactly the days when the exit price has been adjusted against them.
Questions readers ask
Are costs really more important than returns?
No. Returns dominate the outcome. Costs are simply the part you can decide, which makes them the better use of your attention.
How much time should this take?
An hour a year to total your charges and compare a few local alternatives. That is a complete cost strategy for most long-horizon investors.
