Partial Fill Only X Shares Executed What Happens to the Rest

02 September 2026

A partial fill happens when the matching engine finds some shares at your price, but not enough to fill your entire order. This is common in thin markets. It is not an error.

The remainder does not disappear. Unless you used a time-in-force instruction that cancels unfilled portions, the leftover shares stay on the order book as a resting limit order. That order sits there waiting for additional matching volume at the same price.

Two time-in-force settings override this default behavior. Immediate-or-Cancel (IOC) fills whatever it can instantly and cancels the rest. Fill-or-Kill (FOK) requires the entire order to fill in one shot or it cancels everything. Without these, the unfilled portion persists.

How partial fills differ for limit orders versus market orders

A limit order states a specific price. When a partial fill occurs, the filled portion executes at that limit price or better. The unfilled part remains as a limit order at the same price. It continues to rest on the book. You can leave it there, cancel it, or replace it with a different order.

A market order does not specify a price. It demands immediate execution at the best available prices. If the market order is large relative to available liquidity, it may walk the book, filling at progressively worse prices until done. But if even the entire book at all price levels cannot satisfy the full quantity, the exchange will partially fill the market order at available prices and then either cancel the remainder (IOC behavior is standard for many market orders) or convert the unfilled portion into a limit order at the last executed price, depending on the exchange's rules.

On munchcoin.xyz, the token MUNCHKIN trades on Solana via PumpSwap. As of August 31, 2026, the market shows thin liquidity. The 24-hour volume is $3.13. Only one transaction occurred in the past day. Liquidity sits at $4,185.70. These numbers mean partial fills are a realistic possibility for any order that is not tiny.

What you should do with the unfilled portion

You have three options.

First, do nothing. The resting order stays. It might fill later if more orders arrive at your price. In a market with 19 trading pairs and minimal daily activity, that wait could be long.

Second, cancel the resting order. Then decide if you want to try again. You could adjust your price higher (for a buy) or lower (for a sell) to increase the chance of a fill. You could also split the order into smaller pieces and send them at different times.

Third, replace the order with a different time-in-force. If you do not want a resting order at all, use IOC or FOK. IOC will grab whatever is available and walk away. FOK will only proceed if the entire quantity can be filled instantly. In a thin market, FOK orders often fail completely.

Why the unfilled portion matters

A partial fill leaves you with a position you did not fully intend. If you bought 50% of your target, you are half in. The market can move against you while the rest sits unfilled. You also carry the same fixed costs - network fees, slippage - for a smaller trade.

For market orders, the risk is different. A partial fill on a market order means the exchange could not find enough liquidity at any price. The unfilled portion either cancels or converts to a limit order. If it converts, you now hold a limit order at a price that may already be unfavorable relative to the current market.

Practical takeaway

Check the order book depth before you trade. Look at the quantity available near your price. If the book is thin, expect partial fills. Use limit orders with a time-in-force that matches your intention. If you need certainty, IOC or FOK are the tools. If you are willing to wait, let the order rest. Just understand that in a market with 24-hour volume of $3.13 and a single transaction, waiting may not produce results quickly.

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