Reading Crypto Selloffs Through Volatility, Funding, and Open Interest

Summary

This commentary examines a BTC and ETH spot selloff through changes in options implied volatility, perpetual swap funding, and open interest. It reports that one-month at-the-money implied volatility rose from a subdued trend, while perpetual funding turned sharply negative and open interest declined, especially in BTC. The combination is interpreted as liquidation or closure of long perpetual positions rather than a broad opening of fresh shorts.

The authors propose that hedging by short gamma options traders may have amplified the move: delta-neutral short volatility positions can require selling as prices fall. They further infer that, if options hedging contributed, the pattern is more consistent with reductions in hedges against short calls than short puts. A pre-selloff volatility smile skew toward out-of-the-money puts is offered as supporting context. This is a market interpretation, not proof of causation; the commentary supplies chart descriptions but no detailed dataset or method for isolating options hedging from liquidations and other flows.

Key ideas

• The selloff coincided with higher BTC and ETH implied volatility and sharply negative perpetual funding.
• Falling open interest is presented as evidence that long positions closed or were liquidated rather than new shorts dominating.
• Short gamma hedging can add selling pressure during a falling market when traders rebalance delta exposure.
• The authors infer that any options-related hedge reduction may have involved short calls more than short puts.
• The proposed explanation is suggestive and does not establish causality from the reported indicators alone.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.