A COMEX approved depository is a storage facility authorized to hold gold, silver and other qualifying metals within the exchange’s warehouse and delivery system.
These facilities are more than secure vaults. They operate under specific requirements covering custody, insurance, recordkeeping, inspections and the handling of metal entering or leaving the system.
The bullion stored there can belong to banks, trading firms, institutions or other customers. COMEX does not simply own the metal appearing in its warehouse reports.
For investors watching physical supply, these vaults provide one of the more visible parts of the market. Their reported holdings feed into the Gold & Silver Inventory Tracker, where changes in registered, eligible and total stocks can be followed over time.
Even so, COMEX inventories represent only a fraction of all gold and silver held around the world.
What Makes an Approved Depository Different?
A vault does not become part of the COMEX system simply because it can store bullion securely.
The operator has to satisfy exchange requirements and continue meeting them after approval. Financial standards, insurance, operating procedures, recordkeeping and the ability to handle metal properly all matter.
The reason is practical.
A standardized warehouse network allows market participants to trade physically deliverable futures without having to investigate every storage facility independently.
The exchange needs confidence that the metal can be identified, recorded and handled consistently. Clearing firms and customers need confidence that bullion represented within the delivery system actually exists in an approved location and meets the required standards.
Warehouse operators can also be subject to inspections and oversight.
Accurate records are especially important because physical location and exchange status are not the same thing. A bar can remain on the same rack inside the same vault while its classification within the COMEX system changes.
This is one reason warehouse numbers should always be read according to the definitions behind them rather than treated as a simple count of bars.
How Gold and Silver Enter the Warehouse System
Two separate requirements have to be satisfied.
The facility must be approved, and the bullion itself must qualify under the specifications of the relevant futures contract.
A genuine gold bar does not automatically qualify for exchange delivery.
The metal may need to satisfy requirements covering purity, weight, form, identification and acceptable producers or refiners.
An assay can establish the composition of the metal, but exchange eligibility involves more than purity alone.
Once acceptable bullion enters the facility, the warehouse records it within the appropriate system and maintains the information needed to identify and track it.
At wholesale scale, this matters enormously.
A market dealing in large quantities of precious metal cannot function efficiently if every transfer requires buyers to retest unknown bars and renegotiate storage conditions. Standardized bullion and recognized custody reduce those frictions.
This is also why the COMEX structure should not simply be applied to every other precious-metals market. The London gold market, for example, is predominantly an OTC market with its own settlement and custody conventions.
Gold can trade globally while the operational systems behind those trades remain quite different.
Who Owns the Metal Inside the Vault?
The warehouse operator provides custody. It does not automatically become the owner of the bullion.
This distinction is easy to overlook when inventory reports show millions of ounces sitting inside one facility.
A COMEX approved depository may hold metal for numerous customers at the same time. Those owners can include financial institutions, trading firms and other market participants.
If a bank moves silver into an approved warehouse, COMEX has not bought the silver.
If the same metal later leaves, COMEX has not sold it.
The warehouse simply records a change in the amount of qualifying bullion held within the exchange-recognized system.
Ownership can also change without the bars moving.
That is particularly useful in wholesale markets because repeatedly transporting heavy, valuable bullion would be inefficient and expensive.
A bullion bank may simultaneously have positions in physical metal, futures, forwards, swaps and financing transactions, so a warehouse movement rarely reveals the institution’s entire economic exposure.
The physical bar is only one part of a much larger market structure.
Registered, Eligible and Physical Movement
Qualifying metal inside an approved warehouse can be reported as registered or eligible.
COMEX Registered Silver is positioned within the exchange delivery system, while COMEX Eligible Silver meets the relevant specifications but is not currently registered for delivery.
Both categories can sit inside the same building.
Suppose a vault holds 30 million ounces of registered silver and 70 million ounces of eligible silver.
Total inventory is 100 million ounces.
If 5 million ounces change from eligible to registered, the warehouse still contains exactly 100 million ounces.
No truck had to arrive.
No bars had to leave.
The metal simply changed status.
A COMEX warrant is part of that delivery structure because it represents title to specific qualifying metal. The depository provides the approved storage environment, while the warrant relates to the metal’s title and delivery status.
This distinction becomes especially important when inventory headlines focus only on registered stocks.
A sharp decline in registered silver can look dramatic, but if eligible inventory rises by roughly the same amount, the metal may still be sitting in the same warehouse.
A genuine withdrawal is different.
When bullion leaves the reported warehouse system, total inventory declines.
Even then, the report usually does not tell us where the metal went.
It may have moved to another vault, a refiner, an industrial buyer, private storage or another trading center.
The warehouse data capture what happened inside the COMEX system, not the metal’s entire journey afterward.
What COMEX Depository Data Can Tell Investors
Warehouse inventories provide a useful window into a part of the physical gold and silver market that is otherwise difficult to observe.
Persistent withdrawals deserve attention.
So do sustained increases in stocks or large changes in the balance between registered and eligible metal.
But the figures have limits.
A COMEX approved depository does not contain all the precious metal available in the United States. Gold and silver also sit in private vaults, dealer inventories, industrial facilities, investment products, central-bank reserves and private hands.
The warehouse network is therefore a defined subset of the much larger pool of metal already above ground.
Futures activity introduces another distinction.
A large amount of open interest can represent many times the quantity of registered metal without implying that every long contract holder intends to take delivery. Most futures positions are closed or rolled before reaching that point.
Eligible inventory also should not be treated as guaranteed delivery supply merely because the metal meets exchange specifications. Its owner still controls whether it is moved into registered status.
Transactions outside the normal delivery process can add another layer. An Exchange for Physical swaps futures exposure for a related physical or cash-market position and does not automatically correspond to a warehouse inflow or withdrawal.
That is why one isolated number rarely tells the whole story.
Registered stocks, eligible stocks, total inventories, deposits, withdrawals and futures positioning become far more informative when viewed together.
The depository itself is simply the infrastructure that allows qualifying bullion to be stored, tracked and used within that system.
Frequently Asked Questions
What Is a COMEX Approved Depository?
A COMEX approved depository is a storage facility authorized to hold qualifying gold, silver or other metals within the COMEX warehouse and delivery system.
Does COMEX Own the Metal in These Warehouses?
No.
The bullion can belong to customers, financial institutions or other owners. The depository provides custody and administers the metal according to exchange requirements.
Can Any Vault Become a COMEX Depository?
No.
The facility must meet the exchange’s requirements for areas such as operations, financial standards, insurance, security and recordkeeping.
Does Every Bar Inside an Approved Warehouse Qualify for Delivery?
Not automatically.
The metal itself must satisfy the specifications of the relevant futures contract.
Can Eligible Silver Become Registered Without Moving?
Yes.
Qualifying metal can change from eligible to registered while remaining in the same physical location.
Does Falling Registered Inventory Mean Silver Left COMEX?
Not necessarily.
Metal can move from registered to eligible status without leaving the warehouse. A decline in total inventory is a stronger indication that bullion actually left the reported system.
Are COMEX Stocks the Same as Total U.S. Gold and Silver Supply?
No.
They represent qualifying metal held within a specific network of approved facilities, while much larger quantities can exist elsewhere.
Why Are Approved Depositories Important?
They provide the custody, recordkeeping and physical infrastructure that allows qualifying metal to participate in COMEX delivery and gives the market standardized warehouse inventory data.
