Supply Caps and Borrow Caps in Hyperliquid Portfolio Margin
Supply and borrow caps limit how much of an asset can enter Portfolio Margin lending and how much can be borrowed, containing concentration and liquidity risk at the asset level.
Portfolio Margin caps are risk limits. A supply cap limits the eligible amount of an asset that can participate in the lending system, while a borrow cap limits aggregate debt. These parameters keep a fast-growing carry trade or concentrated collateral asset from scaling faster than the protocol's ability to liquidate and source liquidity.
Why a lending system needs caps
A market can look liquid during normal conditions and become much harder to unwind during a stress event. If a protocol allows unlimited borrowing against an asset with limited depth, a correlated price move can create more liquidation volume than the market can absorb.
Caps convert that market-liquidity assessment into an explicit quantity limit.
Global caps and user caps solve different problems
A global cap controls system-wide exposure. A user-level cap limits concentration in a single account even if the global pool still has room.
Both matter. A diversified pool can tolerate more total exposure than one account should be allowed to control, while a restrictive user limit cannot protect the system if thousands of users collectively exceed safe liquidity.
Caps can bind before interest rates do
Utilization-based rates encourage the market to self-balance, but price incentives are not always enough. A trader may still borrow aggressively because another leg of a trade offers more yield.
A hard borrow cap is the point where the protocol refuses additional aggregate debt regardless of the price a borrower is willing to pay.
How to model cap risk
A strategy that requires rolling debt should not assume future borrow availability. Monitor current utilization, borrow capacity, supply capacity, and the protocol's parameter updates.
If a cap is nearly full, the relevant risk is not only a higher APY. It is the inability to increase or potentially re-establish the position after it has been reduced.
Parameters change
Current live caps differ by asset and may be adjusted as liquidity and risk evolve. Academy pages should therefore expose a last-verified date and link directly to the live Portfolio Margin documentation rather than present a copied table as permanent.
Historical values are useful for research only when clearly dated.