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What changed in perp markets on September 28, 2026

On September 28, 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: 0.53 bps. Lighter had the lowest measured cost for a $10,000 ETH market buy: 0.28 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 28, 00:37 UTCSource: Cost methodology, Data status

This page keeps the digest of September 28, 2026. Open the newest digest.

Changes on September 28, 2026

  1. Lowest BTC cost at $10,000

    Lighter had the lowest measured cost for a $10,000 BTC market buy: 0.53 bps.

    Now
    Lighter, 0.53 bpsSep 27, 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: 0.28 bps.

    Now
    Lighter, 0.28 bpsSep 27, 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 +0.0063% per 1h to 0.0000% per 1h, so the side that pays changed.

    Now
    dYdX ETH, 0.0000% per 1hSep 28, 00:37 UTC
    Before
    +0.0063% per 1hSep 27, 00:37 UTC
    Change
    -0.0063% per 1h

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

  4. Largest open-interest move

    BingX open interest rose 18.8% in one day, from $1.64B to $1.94B.

    Now
    BingX, $1.94BSep 28, 00:10 UTC
    Before
    $1.64BSep 27, 00:10 UTC
    Change
    +18.8%

    Open the open-interest rankingSource: Daily venue snapshot

  5. Perp market count change

    BingX added 45 perp markets in one day, from 977 to 1022.

    Now
    BingX, 1022 perp marketsSep 28, 00:10 UTC
    Before
    977 perp marketsSep 27, 00:10 UTC
    Change
    +45

    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 28, 00:10 UTC
    Before
    WEEX (unverified)Sep 27, 00:40 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 28, 2026." Digest of September 28, 2026, newest reading Sep 28, 00:37 UTC. https://perpfinder.com/today/2026-09-28

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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.