[BTC Derivatives Market Open Interest Decreased by 49,000 in 7 Days] Vetle Lunde, Head of Research at K33 Research, analyzed that over the past 7 days, the combined open interest of BTC on CME and perpetual contracts decreased by 49,000, marking the largest weekly drop since October 2025. During this period, market volatility remained subdued, funding rates continued to decline, and this round of deleveraging was driven by proactive profit-taking.