September's exchange data: spot trading returns, and the biggest venues keep winning
Centralized spot volume rose 27% in September. Most of the rebound went to the largest platforms, while derivatives lost a little share of the market.
EXCHANGESTRADINGANALYSIS
Hana Kimura
10/28/20263 min read
After a summer in which trading desks complained about empty order books, September brought the first clear sign that traders were returning to centralized exchanges. According to CoinDesk Data's monthly exchange review, published on October 13, spot volume on centralized platforms climbed 27.3% to $1.13 trillion, the second monthly gain in a row. Derivatives volume rose as well, by 15.7% to $3.94 trillion, its strongest month since March. On the surface the numbers look healthy. Underneath, they describe a market in which the gains are flowing to fewer and fewer venues.
The rebound tracked price. Bitcoin climbed from roughly $77,000 to about $83,000 over the month, and rising prices tend to pull sidelined traders back to their screens. Yet derivatives volume still sits about 30% below September 2025, a reminder that activity is recovering from a deep trough rather than setting records. October has been harder so far: Bitcoin slipped back below $80,000 and spot ETFs recorded outflows, so the September bounce may turn out to be a pause rather than a turn.
Spot is gaining ground on leverage
The most telling shift is in the mix of trading. Derivatives accounted for 77.6% of combined centralized volume in September, down from 79.3% in August and from a record 80.3% in July. A move of under three percentage points sounds small, but it runs against a multi-year trend in which perpetual futures steadily crowded out spot trading. When spot grows faster than futures, it usually means buyers are taking delivery of coins instead of renting exposure with borrowed money.
That reading fits other data. CryptoQuant reports that Bitcoin balances on exchanges have fallen since late September, and funding rates on altcoin perpetuals have cooled toward two-year lows. Together these point to a market with less speculative froth than in earlier recoveries. That is not necessarily good news for prices, but it is a sturdier base for exchanges, which earn wider margins on spot trades than on heavily discounted futures fees.
Not every derivatives segment grew. Volume in perpetual contracts that reference real-world assets, such as tokenized stocks and commodities, fell 19.8% to $413 billion, the first monthly decline since April. Binance alone held 68.5% of that market, according to CoinDesk Data, which shows how quickly the largest venue captured a product category that barely existed a year earlier.
The top of the table is getting heavier
Binance remained the dominant spot venue with 28.5% of volume, followed by OKX at 6.16% and Coinbase at 5.86%. Coinbase overtook Bybit for third place after its spot volume jumped 41.4% to $63.6 billion. In derivatives, Binance handled $1.78 trillion, or 45.3% of the total, nearly three times as much as OKX. The three largest platforms in CoinDesk's top-tier group took 53.8% of that group's spot volume, up from 52.2% a month earlier.
Concentration is not new, but the context has changed. Within three months, BitMEX, BitMart and CoinEx all announced wind-downs, each citing some mix of thin volume and rising compliance costs. When smaller venues exit, their users and market makers migrate to the largest order books. That deepens liquidity at the top and makes life even harder for the next mid-tier competitor. The September figures capture this loop in motion.
Decentralized venues hold a fifth of spot
The picture is incomplete without on-chain trading. Decentralized exchanges processed about $279 billion in spot volume in September, a 19.8% share of combined activity, while on-chain futures venues handled roughly $627 billion, up about 13%. These platforms are the main competitive check on the centralized giants. They do not need a license in every country, and they absorb users who leave closing exchanges without wanting to pass a new identity check elsewhere.
Three things are worth watching in the coming weeks. The first is whether October data confirms or reverses the shift toward spot, given the month's sell-off and $436 million in liquidated long positions. The second is whether Coinbase can hold third place in spot after it reports quarterly results on October 29. The third is whether the top three keep gaining share as the last mid-tier wind-downs complete. If spot's share keeps rising while concentration deepens, the industry will look less like a casino with many tables and more like a handful of large utilities. That may be the clearest trend in this year's data.