Key points

  • CoinGlass data showed Bitcoin open interest rising to about 653,000 BTC from 626,000 BTC, an increase of roughly 27,000 BTC.
  • The notional increase was about $2.3 billion, while annualized perpetual-futures funding rose from roughly 3% to 10% in the same window.
  • The expansion came from a 12-month low and does not guarantee further price gains; more leverage can amplify a reversal and forced liquidations.

Bitcoin derivatives traders rebuilt leverage into the start of October, lifting aggregate open interest by about 27,000 BTC as prices moved higher. CoinGlass data cited by CoinDesk showed outstanding futures and perpetual positions reaching approximately 653,000 BTC, worth about $56.2 billion, from 626,000 BTC on September 30. The increase amounted to roughly $2.3 billion, or 4.3%, and marked a return of activity after open interest had finished September near a 12-month low.

Open interest rose with the price

Bitcoin advanced from about $83,500 to $86,500 during the measurement window. When price and open interest rise together, it generally means traders are opening new positions rather than only closing existing ones. That combination can support momentum, but open interest alone does not reveal whether every new contract is long or short. Each contract has counterparties on both sides, and the notional total can also change with Bitcoin's dollar price. The directional clue came from the perpetual-futures funding rate, which became more positive as positions accumulated.

Related reporting: Bitcoin and Ether options worth $16.3B approach Deribit expiry

Long exposure became more expensive

CoinDesk reported that the annualized funding rate rose from roughly 3% to 10% over the same period. Perpetual contracts have no expiry, so exchanges use periodic payments between long and short holders to keep the contract price close to the spot market. Positive funding means traders positioned for higher prices pay those positioned for declines. A higher positive rate therefore shows stronger demand for long exposure, while also increasing the carrying cost of keeping that trade open. Funding schedules and formulas differ by venue, so the annualized figure is best used as an aggregate indicator rather than a fee every trader pays at the same rate.

A low base matters

The latest increase should be read against the preceding reduction in leverage. Aggregate open interest around 625,000 BTC at the end of September was close to its lowest level in a year, according to the CoinGlass series. That makes the rebound meaningful as a change in positioning, but smaller than it would appear without the context. It is a rebuild from a depleted base rather than evidence that leverage has returned to a record.

The jobs report changed the immediate backdrop

The positions were added before the September U.S. employment report. After the data showed payroll growth of 29,000 and unemployment at 4.2%, Bitcoin briefly traded near $87,000 before giving back part of the move. By early October 3 UTC, CoinDesk's price page showed Bitcoin around $84,200. That retracement illustrates why a snapshot of open interest and funding should not be treated as a forecast: positioning can change quickly after a macroeconomic release.

More leverage raises two-sided risk

Growing open interest can deepen liquidity and show renewed market participation, but it can also make price moves more abrupt. If Bitcoin rises, short positions may be forced to close, adding demand. If it falls while funding remains positive, leveraged longs can face margin calls and liquidations that reinforce selling. The key follow-up is whether open interest remains elevated while funding stays moderate, or whether funding becomes crowded and contracts unwind. CoinGlass provides live exchange-level data, so the totals will continue to move; the $56.2 billion figure describes the reported October 2 window, not a permanent market level.

Sources

AI-generated editorial image; not a photograph of the reported event. Prepared with AI assistance and source verification.