Arthur Hayes Dumps Entire ZEC Position After Orchard Pool Bug

Arthur Hayes, the BitMEX co-founder, confirmed today that he liquidated his entire Zcash (ZEC) position after a protocol bug in the Orchard Pool. Zcash's core shielded transaction layer bug was disclosed publicly, compounding an already difficult few weeks for ZEC. The move completes the full liquidation of his self-described 'Holy Trinity' portfolio, which previously included HYPE and NEAR tokens.

The Holy Trinity is dead. Sadly due to the Orchard Pool exploit, I had to dump our entire $ZEC bag. – While I think it's extremely unlikely of any minting, it cannot be formally cryptographically proved impossible – The privacy from AI, govt, big tech narrative demands perfection… — Arthur Hayes (@CryptoHayes) June 5, 2026

The central question the market is asking is not whether Hayes was right to exit, the bug is real, the risk is documented, but whether this was a cold-eyed protocol risk assessment or a reactive flush after a vulnerability shook his conviction in privacy coins as a category. The evidence points heavily toward the former. That distinction matters for anyone trying to read this exit as a signal.

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The Orchard Pool Bug: What the Vulnerability Actually Means for ZEC

The Orchard Pool is Zcash's next-generation shielded transaction circuit, introduced with the NU5 upgrade in May 2022. It replaced the older Sapling pool and brought trustless zk-SNARKs via the Halo 2 proving system, no trusted setup required. The pool exists specifically to enable fully private transfers, and its cryptographic soundness is not a feature; it is the entire value proposition of ZEC. Fitting, then, that the soundness is exactly what the bug touched.

The bug, identified on May 29, 2026, by security engineer Taylor Hornby of Shielded Labs, using AI-assisted formal methods including Anthropic's Claude Opus 4.8, was an insufficient constraint in elliptic-curve multiplication inside the halo2_gadgets crate. The disclosure was accompanied by a public thread from Zcash co-founder zooko.

In easy terms, crafted inputs could theoretically bypass the circuit's validity checks and produce counterfeit ZEC that still passed Orchard's verification. An emergency hard fork was activated on June 3, 2026, patching the flaw. But the window from NU5 activ