Mid price
- The mid price is the midpoint between the best bid and the best ask.
- It is calculated from quotes; no trade has to occur at that number.
- The large number on a StockTicker24 card is the mid price of a perpetual-futures contract.
Mid price: definition, StockTicker24 display rules and dated production-data examples.
Definition
The best bid is the highest buy quote, and the best ask is the lowest sell quote. The U.S. Securities and Exchange Commission defines both in Regulation NMS (17 CFR §242.600). The mid price is the point halfway between them.
Some markets round the midpoint to a permitted price step. Osaka Exchange calls it the BBO mid and rounds it to the nearest permitted price; with two equally near, it takes the higher one. Its own example uses mini TOPIX futures: best bid 1,300 and best ask 1,300.25 give a BBO mid of 1,300.25, not 1,300.125.
A trade happens only when a buy quote and a sell quote match. The mid price is a value computed from quotes, so it does not show that anyone traded there. Midpoints also appear inside index methods: the VIX uses the bid-ask midpoint of each S&P 500 option.
The bid-ask spread behind it is not shown on the board.
the mid price comes from quotes, not from trades.
How it appears on StockTicker24
The large card price and the symbol-page reference value both use the mid price first. When the mid price is unavailable, the site falls back to the mark price. The footer's phrase "mark/mid reference values" covers both.
The site retrieved its production board snapshot (/api/board-snapshot) at Oct 10, 2026, 05:01:18 UTC (capturedAt 05:01:10.627 UTC).
| Card | Mid price (midPx) | Mark price (markPx) |
|---|---|---|
| Gold | 4,189.85 | 4,189.8 |
| USD/JPY | 158.265 | 158.26 |
| Tesla | 382.965 | 382.96 |
| Nikkei 225 | 68,900.0 | 68,900.0 |
For Nikkei 225 the two values were equal at that moment. For the other three, the mid price was 0.005 or 0.05 above the mark price.
The snapshot carries no order-book depth. StockTicker24 does not show the book, so the width of the spread behind each mid price cannot be read from the board.
the big number is a mid price, and the board does not show the quotes that produced it.
Examples from the current board
Saved observation:
Tables scroll horizontally. Values use each contract’s quoted unit; no currency conversion.
| Symbol / contract | Unit | Price (mid; mark if missing) | prevDayPx | Difference vs. prevDayPx | Change vs. 24h earlier | Mark price | Mid price | (mark ÷ mid − 1) × 100 |
|---|---|---|---|---|---|---|---|---|
| Roundhill Neocloud ETFxyz:NCLD | USDC | 16.524 | 16.685 | −0.161 | −0.964939% | 16.652 | 16.524 | +0.774631% |
| KOSPI 200xyz:KR200 | USDC | 840.47 | 851.74 | −11.27 | −1.323174% | 843.8 | 840.47 | +0.396207% |
| Applied Optoelectronicspara:AAOI | USDC | 72.827 | 75.0 | −2.173 | −2.897333% | 73.1 | 72.827 | +0.374861% |
| SoFi Technologiespara:SOFI | USDC | 14.3075 | 14.514 | −0.2065 | −1.422764% | 14.356 | 14.3075 | +0.338983% |
| Cipher Digitalpara:CIFR | USDC | 8.8873 | 8.9963 | −0.109 | −1.211609% | 8.9155 | 8.8873 | +0.317307% |
Price = mid price, or mark price when mid is unavailable. Difference = price − prevDayPx; change vs. 24h earlier = (price ÷ prevDayPx − 1) × 100. Funding rate (%) = hourly decimal × 100. Calculated values are rounded to six decimal places.
Data: our board (perpetual-futures reference values), observed
No matching numeric example is available in this snapshot; the related board card is shown below.
Price: mid price (mark if missing) · perpetual futures / vs. 24h earlier / / Saved / stale
Data: our board (perpetual-futures reference values), observed
Questions
Is the mid price the last traded price?
No. It is the midpoint of the best bid and best ask. A trade at that exact number may not have happened.
Can I always trade at the mid price?
A trade happens where a buy quote and a sell quote match. The mid price is a reference computed from quotes. StockTicker24 has no trading function.
Why does the card sometimes switch to the mark price?
If the mid price is unavailable, the card uses the mark price so that a price is still shown.
Related
Sources
The production API examples are a fixed historical snapshot. Building this page does not fetch new prices.
External source titles and URLs were checked on Oct 11, 2026. The historical content retrieval dates are listed below.
- U.S. Securities and Exchange Commission, 17 CFR § 242.600 — NMS security designation and definitions. (content retrieved Aug 23, 2026, as cited on the Japanese page).
- Osaka Exchange, 即時約定可能値幅制度 (content retrieved Aug 23, 2026, as cited on the Japanese page).
- Japan Securities Clearing Corporation, 【投資者の皆様へ】先物・オプション取引の清算値段決定方法の一部見直しについて (content retrieved Aug 23, 2026, as cited on the Japanese page).
- Tokyo Stock Exchange, 内国株の売買制度「売買成立の方法」 (content retrieved Aug 23, 2026, as cited on the Japanese page).
- StockTicker24 production API
/api/board-snapshot, retrieved Oct 10, 2026, 05:01:18 UTC.