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What changed in perp markets on September 26, 2026

On September 26, 2026, PerpFinder recorded 6 changes in perp markets from its stored trading cost, funding, open interest and volume data. Lighter had the lowest measured cost for a $10,000 BTC market buy: 0.18 bps. Lighter had the lowest measured cost for a $10,000 ETH market buy: 0.50 bps. The headline volume totals hold out 1 venue: WEEX.

The daily changes in trading cost, funding, open interest, listings and volume quality. Each change shows the new value, the earlier value and the time of both readings.

6 changesDaily digestas of Sep 26, 00:37 UTCSource: Cost methodology, Data status

Changes on September 26, 2026

  1. Lowest BTC cost at $10,000

    Lighter had the lowest measured cost for a $10,000 BTC market buy: 0.18 bps.

    Now
    Lighter, 0.18 bpsSep 25, 18:56 UTC
    Before
    No earlier reading—
    Change
    —

    Open the cost rankingSource: Stored cost sweeps: taker fee + half-spread + price impact

  2. Lowest ETH cost at $10,000

    Lighter had the lowest measured cost for a $10,000 ETH market buy: 0.50 bps.

    Now
    Lighter, 0.50 bpsSep 25, 18:56 UTC
    Before
    No earlier reading—
    Change
    —

    Open the cost rankingSource: Stored cost sweeps: taker fee + half-spread + price impact

  3. Largest funding flip

    dYdX ETH funding went from +0.0032% per 1h to -0.0040% per 1h, so the side that pays changed.

    Now
    dYdX ETH, -0.0040% per 1hSep 26, 00:37 UTC
    Before
    +0.0032% per 1hSep 25, 00:37 UTC
    Change
    -0.0072% per 1h

    Open the funding ratesSource: Stored 15-minute funding sweeps, current rate

  4. Largest open-interest move

    Deribit open interest rose 8.6% in one day, from $1.06B to $1.15B.

    Now
    Deribit, $1.15BSep 26, 00:10 UTC
    Before
    $1.06BSep 25, 00:10 UTC
    Change
    +8.6%

    Open the open-interest rankingSource: Daily venue snapshot

  5. Perp market count change

    BingX removed 42 perp markets in one day, from 1023 to 981.

    Now
    BingX, 981 perp marketsSep 26, 00:10 UTC
    Before
    1023 perp marketsSep 25, 00:10 UTC
    Change
    -42

    Open the venue listSource: Daily venue snapshot (exchange market counts)

  6. Volume-quality hold-outs

    The headline volume totals hold out 1 venue: WEEX.

    Now
    WEEX (unverified)Sep 26, 00:10 UTC
    Before
    WEEX (unverified)Sep 20, 15:59 UTC
    Change
    No change

    Open the volume-quality researchSource: Daily venue snapshot and the volume hold-out rules

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Terms used on this page

Total trading cost (all-in cost)
Total trading cost (all-in cost) is the selected-side cost of one order at a given size: the fee plus half of the spread plus the price impact, in bps and USD.
Funding rate
A funding rate is the periodic payment between long and short positions that keeps a perpetual futures price near its index price. When the rate is positive, longs pay shorts.
Open interest (OI)
The total notional value of all outstanding perpetual futures positions on a venue — one side counted, in USD.

Cite this data

Cite the dated address. The page for one day keeps the same numbers after later digests arrive. Each change links to the page with its full data and source.

PerpFinder. "What changed in perp markets on September 26, 2026." Digest of September 26, 2026, newest reading Sep 26, 00:37 UTC. https://perpfinder.com/today/2026-09-26

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  • What changed today: one page with the daily changes in cost, funding, open interest and listings.
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Earlier days

How this page is made

A scheduled job builds this page once a day at 00:40 UTC, after the 00:10 UTC daily venue snapshot. The job reads stored data only. Each change compares the newest stored reading with the reading from about one day earlier.

Trading cost is the taker fee plus half the spread plus price impact for one market buy. Funding shows the rate in the venue's own interval. A dash (—) means that no earlier reading is available. The digest never replaces a missing value with zero.