# Bitcoin and Ether Extend Losses as Derivatives Positions Rise

By Enna Lee

Canonical URL: https://www.tokenpost.com/news/investing/32517
Published: 2026-10-15T13:03:54.000Z
Updated: 2026-10-15T13:03:54.000Z
Section: Investing

> Open interest increased after September inflation data, while spot Bitcoin ETFs recorded about $859 million in net outflows over six trading sessions.

Bitcoin (BTC) and Ether (ETH) extended declines after September U.S. inflation data as crypto derivatives open interest increased and spot Bitcoin exchange-traded funds recorded about $859 million in net outflows over six trading sessions.

By midnight ET Oct. 15 (04:00 UTC), BTC was down 3.50% and ETH had fallen 6.27%. Treasury yields rose sharply after the release, then gave back some gains as crypto losses continued.

Open interest across major cryptocurrencies increased during the first four hours after the CPI release. Solana (SOL) open interest was 7.95% higher by midnight ET Oct. 15, a sign that leveraged exposure continued to build during the decline.

BTC trading volume rose about fivefold in the first 30 minutes after the data. Initial support near $83,000 did not stop the slide.

Across 18 previous CPI releases, the degree by which inflation exceeded expectations had a -0.46 correlation with BTC returns in the first 30 minutes. The correlation fell to -0.14 over four hours and -0.09 over 24 hours.

A break below $80,200 accompanied by a rapid drop in open interest could trigger further deleveraging.