Bitcoin derivatives traders are carrying elevated exposure into September, with futures open interest at $54.82bn while the spot price stood at $78,425 at 19:00 Eastern time on 30 August. Although calls remain ahead of puts across the outstanding options market, the latest trading flows are shifting towards downside protection, raising the prospect of a volatile start to the month.
Data from Coinglass showed aggregate futures open interest of 695,020 BTC across major venues this weekend. The total fell by 0.26% over one hour and 0.38% over four hours, although it was still 1.15% higher over the previous 24 hours.
The modest declines suggest traders have reduced some positions without making a wholesale retreat from the market.
Binance remained the largest venue by futures open interest, with 142,500 BTC worth $11.24bn. That represented 20.5% of the tracked market. CME was second, with 116,040 BTC valued at $9.15bn and a 16.69% share. CME’s position is closely watched because it provides an important indication of institutional activity.
MEXC accounted for $5.01bn, followed by Bybit with $4.58bn and Gate with $4.57bn. OKX held $2.79bn, while Bitget and Kucoin had $2.16bn and $1.62bn respectively.
Most major exchanges recorded lower open interest over the four hours leading into Sunday. BingX was an exception, increasing by 34.50%, while Bitunix rose by about 1.29%.
The futures market has recovered significantly from its June lows. Historical data indicated that bitcoin futures open interest had dropped towards the mid-$40bn range in June before climbing back above $54bn in late August, as bitcoin recovered and moved through $81,000.
That rebound means leverage has returned alongside the price, leaving more capital vulnerable should market volatility increase sharply.
One popular crypto X account this weekend wrote:
Calls dominate, but fresh trading favours puts
Bitcoin options open interest has also risen considerably, reaching about $44bn this weekend compared with roughly $25bn at the beginning of August.
Calls accounted for 288,409.93 BTC of outstanding positions, against 185,234.42 BTC in puts. Calls therefore represented 60.89% of total open interest, with puts making up the remaining 39.11%.
The most recent 24-hour trading volume presented a more cautious picture. Put options represented 54.49% of activity, with 12,380.77 BTC traded, compared with 10,339.78 BTC in calls.
That leaves the established options book tilted towards a higher bitcoin price, while newer trades indicate that investors are increasingly seeking protection against a decline.
On Deribit, the largest individual open-interest position was the 25 September $70,000 call, at 11,018.2 BTC. It was followed by the 25 December $80,000 call at 8,590 BTC, the 25 September $85,000 call at 8,373.9 BTC and the 25 September $100,000 call at 7,323.4 BTC.
A 25 September $70,000 put held 7,227.3 BTC, showing that significant positioning exists on both sides of the market.
CME options activity also increased towards the end of August. Contracts expiring within one or two months represented the largest visible group in its expiration-stacked data. Calls expanded sharply during the final August sessions, while puts remained present but made up a smaller proportion of the newest positions.
Max-pain levels underline uncertainty
Max pain refers to the strike price at which option holders would theoretically suffer the greatest combined losses when contracts expire.
Deribit, the largest bitcoin options exchange owned by Coinbase, showed near-term max-pain levels between $70,000 and $80,000. The level was about $78,500 for 31 August and 1 September, $75,000 for 4 September and $70,000 for 25 September. Most longer-dated Deribit expirations were concentrated near $70,000, with the exception of 27 November, when the level was around $80,000.
Binance showed max-pain levels close to $78,500 for 31 August, $75,000 for 4 September, $80,000 for both 11 and 18 September, and approximately $73,000 for 25 September.
OKX’s figures were similar: about $78,500 for 31 August, $75,000 for 4 September, $80,000 for 11 September and $70,000 for 25 September.
With bitcoin at $78,425, derivatives positioning points to a turbulent September rather than a quiet continuation of the summer rally. Futures exposure remains high and calls still dominate outstanding options, but puts are leading the latest trading volume and several max-pain levels sit below the current spot price.
The overall message is mixed: traders continue to hold positions targeting further gains, while also spending more to guard against a fall.
