Money Suckers
Why Petrol Prices Rise Fast And Fall Slowly
Forecourt prices track wholesale rises within days and wholesale falls over weeks, because drivers search hardest while prices climb and nobody gains by cutting first.
Wholesale fuel costs rise and the sign changes by the weekend. Wholesale costs fall and the sign takes a month to notice. The asymmetry is consistent enough to have a nickname.
Rises pass through faster than falls
Economists describe the pattern as rockets and feathers, and it turns up in fuel markets in many countries rather than being a local peculiarity.
The wholesale price is public and moves daily. Retail prices follow it upward promptly and drift downward reluctantly, and the gap between the two speeds is where the argument sits.
No single explanation accounts for all of it, but several mechanisms push in the same direction, and none of them require anyone to be conspiring.
Drivers shop hardest while prices are climbing
Rising prices are news. People notice, compare stations, drive further for a better price and complain publicly, which makes any station that overshoots visible immediately.
Falling prices attract no such attention. A driver who is paying less than last week feels fine and stops checking, so a station holding its price is not punished.
Search effort is therefore highest exactly when margins are being squeezed, and lowest when they are quietly widening. Competition works better in one direction than the other.
Stations sell fuel they bought earlier
A forecourt holds a tank of fuel purchased at some earlier price, and operators point to this when explaining why the sign lags the market.
The argument is real but symmetrical. Stock bought cheaply also sits in the tank while prices rise, and the sign rarely lags in that direction.
So inventory explains some delay, but not a delay that appears on one side of the market and vanishes on the other.
Cutting first is a bad move
Fuel is one of the most price-transparent products in retail, with the number displayed in large digits from the road. Every competitor sees a cut within hours.
A station that drops its price gains volume only until neighbours match, after which everyone is selling the same fuel at a lower margin. The gain is temporary, the loss is not.
Waiting, by contrast, costs nothing until somebody else moves. The result is a slow ratchet downward with long pauses built into it.
Fuel is not where the money is
Modern forecourts earn a substantial part of their profit from the shop, the coffee machine and the car wash rather than from the pumps.
The fuel price is partly an advertisement for the site, which pushes operators to be competitive on the sign while relaxed about the margin behind the counter.
That makes the pump price a positioning decision rather than a cost calculation, and positioning decisions are revisited slowly.
Questions readers ask
Are card surcharges legal?
It depends entirely on the country. Some ban them for consumer cards, some cap them at cost, some permit them. Check your local consumer authority.
Can I insist on a free paper bill?
In several jurisdictions there are protections for customers without reliable internet access or in vulnerable circumstances. It is worth asking explicitly.
