Physical metal is bought at a dealer's ask and sold at a dealer's bid, and the difference is paid on every completed round trip. The size of that toll depends less on the market than on how often a holder transacts.
What the round trip actually costs
A dealer sells a coin above the wholesale reference price and buys it back below that price. The buyer pays both halves of that arrangement across a full cycle of buying and selling.
The gap is not a fee disclosed on a statement. It is embedded in the two quoted prices, which is why it is easy to overlook while comparing physical metal to exchange-traded products.
A holder who buys once and sells once pays it once. A holder who trades in and out repeatedly pays it every time.
The metal has to move before you break even
Immediately after purchase, a position is worth its bid price while it cost its ask price. The market has to close that gap before the position is level in cash terms.
That required move is fixed by the spread, not by the size of the position. Doubling the quantity roughly doubles both the cost and the eventual gain, leaving the breakeven point where it was.
Shorter holding periods therefore face a heavier burden. The same recovery has to happen over days rather than years.
Product choice changes the width
Widely traded large bars carry the narrowest spreads because dealers can move them onward easily. Small fractional coins carry the widest, since fabrication cost is spread over less metal.
Collectible and commemorative pieces sit wider still, because their resale market is smaller and a dealer may hold them far longer before finding a buyer.
A holder who trades often in fractional or collectible product is paying the widest available toll at the highest available frequency.
Market conditions widen the toll unpredictably
Dealer spreads are not constant. In periods of heavy retail demand, premiums on small coins can widen sharply while buyback bids fail to widen by the same amount.
That asymmetry means the cost of a round trip is not knowable in advance. A holder can buy into a wide premium and later sell into a market that no longer recognizes it.
Quiet markets do the reverse and compress spreads. The point is that the toll varies with conditions outside the holder's control.
Why this favors clarity about time horizon
Knowing in advance whether metal is being held for years or traded around makes the spread question answerable rather than academic. The two uses have very different cost structures.
Exchange-traded products and physical metal differ sharply here, since one charges an ongoing annual expense and the other charges at each transaction.
Neither structure is superior in the abstract. They simply bill in different ways, and frequency of trading is what decides which bill is larger.