Downside futures or securities-market trading curb reached when price falls to an exchange-defined lower limit.
Limit down means a contract or security has fallen to an exchange-defined lower price boundary for the trading session. In futures markets, the lower boundary is usually part of a daily price-limit system. Once reached, trading may be restricted, halted, or allowed only within the permitted range depending on the product rules.
The term is often used casually during sharp selloffs, but the exact mechanics are rule-specific. Equity market-wide circuit breakers, individual-stock Limit Up-Limit Down rules, and futures daily price limits are related but not identical systems.
| Possible effect | What it means |
|---|---|
| Orders below the band rejected | New sell orders may not execute below the allowed range. |
| Market becomes locked limit | Offers may remain at the lower limit with little or no buying interest. |
| Temporary halt | Trading may pause before reopening or expanding limits. |
| Expanded limits | Some futures contracts move to a wider allowable range after trigger conditions. |
| Delayed exit | Traders may be unable to close or hedge at the planned price. |
For current examples of futures price-limit handling, use CME’s price-limits page and price-limits/circuit-breakers explainer.
Limit-down conditions are most dangerous when traders assume a stop-loss order guarantees an exit. If the market gaps through the stop or becomes locked limit down, the order may not fill at the expected level. Hedgers can also be affected because a delayed hedge can leave physical inventory, production, or procurement exposure unprotected.
| Term | Difference |
|---|---|
| Limit down | Lower price boundary for a specific contract or security under applicable rules. |
| Limit up | Upper price boundary. |
| Daily fluctuation limit | Full permitted price range for a futures contract. |
| Circuit breaker | Broader halt mechanism that may apply to indexes, individual securities, or market-wide trading. |