# Bitcoin options OI reaches $37.86B; $82,500 call leads daily volume

By Enna Lee

Canonical URL: https://www.tokenpost.com/news/investing/34337
Published: 2026-10-18T11:21:15.000Z
Updated: 2026-10-18T11:21:15.000Z
Section: Investing

> Bitcoin options open interest increased 0.14% to $37.86 billion. Calls dominated open interest, while puts led 24-hour volume and the $82,500 Bybit call ranked first by volume.

Bitcoin options open interest rose 0.14% to $37.86 billion, with medium-term positioning favoring calls while short-term trading tilted toward puts.

Bitcoin options showed a bullish bias in medium-term positioning. Daily trading, however, reflected stronger demand for downside protection.

As of Oct. 18, 2026, total Bitcoin options open interest stood at $37.86 billion, up 0.14% from $37.81 billion previously. Options trading volume totaled about $1.18 billion.

Calls accounted for 59.78% of open interest and puts for 40.22%. By 24-hour volume, calls represented 47.99% and puts 52.01%.

The call-heavy open-interest mix indicated that accumulated positioning leaned bullish. The higher share of puts in trading volume, meanwhile, suggested near-term hedging demand against volatility.

![Bitcoin options OI reaches $37.86B; $82,500 call leads daily volume](<https://mzwrodgsdjfdyvnraeya.supabase.co/storage/v1/object/public/article-media/articles/aea48ace4c2ae535625b49a95166b3a5334033dbedb983147330db17fd83ffc7.webp>)

The largest open-interest contracts were the $95,000 call expiring Oct. 30 on Deribit, the $90,000 call expiring Oct. 30 on Deribit and the $100,000 call expiring Oct. 30 on Deribit.

The leading contracts by 24-hour volume were the $82,500 call expiring Oct. 19 on Bybit, the $84,000 call expiring Oct. 20 on OKX and the $83,000 call expiring Oct. 19 on Binance.

Editor’s note: Options are derivatives used to make leveraged bets on an underlying asset’s price or hedge existing positions. A call grants the right to buy the asset at a predetermined price, while a put grants the right to sell it. Open interest measures the total number of outstanding options contracts and indicates the scale of accumulated positioning.

Call and put shares, together with changes in open interest and volume, can help distinguish medium-term position building from short-term trading. Rising open interest signals new positions, while a call-heavy open-interest mix alongside put-led volume may indicate bullish positioning combined with defensive demand against a near-term pullback.

This article is based on market data and does not constitute investment advice.