Bitcoin Options Show Strong Call Bias

Bitcoin was trading at $84,195 at the time of writing, marking an 8.02% drop over the past 24 hours. As the expiry approaches, 39,389 BTC contracts worth $3.39 billion will mature, mostly consisting of call options. According to Deribit data, there are 25,920 call contracts versus 13,468 put contracts, giving a put-call ratio of 0.52. This shows that investors hold nearly twice as many bullish positions despite recent declines.

The maximum pain price for Bitcoin stands at $98,000, approximately 14% above the current trading level. Maximum pain refers to the strike price where most options would expire worthless, maximizing losses for holders. After reaching a peak of $126,080 on October 6, 2025, Bitcoin entered a corrective phase, coinciding with broader market weakness.

Ethereum Investors Focus on Upper Strike Calls

Ethereum has also declined, trading at $2,737 after a 6.98% drop over the last 24 hours. Today’s expiry covers 185,730 ETH contracts valued at $524 million, with 108,166 call and 77,564 put options. The put-call ratio of 0.72 indicates slightly weaker bullish sentiment compared to Bitcoin but still confirms continued preference for calls.

Investors are focused on strike levels around $2,900 and $3,100 for the December 2025 expiry. Ethereum’s maximum pain is $3,200, roughly 13% above the current price, implying that many options may expire worthless. However, the continued call positioning confirms that bullish sentiment remains intact.

Market Signals Reflect Cautious Optimism

The derivatives market structure reveals nuanced investor sentiment as expiry approaches. Despite recent declines, investors maintain significant call exposure and do not increase put protection. Deribit analysts noted, “Flows are biased toward calls at higher strikes while downside protection remains weak. Positioning does not indicate major risk avoidance, but investors remain cautious after the recent sharp decline.”

This suggests that the market views the recent drop as a routine correction rather than the start of a prolonged bear phase. High open interest, strong call bias, and low protection could allow short-term call holders to benefit if prices recover toward maximum pain levels. Conversely, further declines could increase losses for bullish positions and create additional selling pressure.

Key Takeaways:

• Approximately $4 billion in BTC and ETH options expire today

• Bitcoin call options maintain dominance despite recent drops

• Ethereum holds call positions at upper strike levels

• Maximum pain levels suggest potential losses for many option holders

• Market continues to reflect cautious bullish sentiment

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The post Bitcoin and ETH Options Expiry Signals Cautious Bullish Sentiment appeared first on Coin Engineer.

The Altcoin Season Index currently stands at 51. The index must surpass 75 to confirm a true altcoin season. At that level, 75% of the top 50 altcoins outperform Bitcoin. For now, this signal remains distant. 

Open interest across major #altcoins has surged to an all-time high of $47B. This concentration of leverage elevates reflexivity, amplifying both upside and downside price reactions and increasing fragility in market structure. pic.twitter.com/GwJp8dsjBp

— glassnode (@glassnode) August 13, 2025

Ethereum Has Yet to Take the Lead 

Bitcoin’s market dominance fell from 65% to 58.9% over the past month. This drop indicates capital is shifting from BTC to altcoins. However, Ethereum is not leading this rotation. ETH dominance remains below 15%, far from its 2024 peak of 22.5%. The ETH/BTC pair continues sideways, with no strong breakout yet. 

Ethereum accounts for $23.6 billion of the total open interest. Solana follows with $7.4 billion, and XRP ranks third with $3.9 billion. Popular assets like AVAX, DOGE, LINK, and BNB complete the list. High leverage can trigger severe liquidations if prices fall, so investors are staying cautious. 

Google Trends data shows a rise in “Altcoin Season” searches over the past week. However, interest is still below the 2021 peak. In 2025, the larger number of altcoins means even more interest is needed to reach similar sentiment levels. Market excitement is building, but a confirmed altcoin season signal has not yet appeared. 

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The post Altcoin Open Interest Hits Record: Is the Season Here? appeared first on Coin Engineer.