JACL 🎮

Oct 10 Crypto Massacre: Binance Edition The most important microstructure fact from the October 10th crypto massacre isn’t just “volatility was high and we had chain congestion,” it’s that the reference/pricing/quotes many desks and DEXs lean on became unreliable, exactly when everyone needed it most. As it stands today, I am cautious to make acquisitions on what the root cause was. It is easy to point fingers at Binance right now but I don’t think that is justifiable, yet. The timing of depegs and initial cascade is still being looked into. This is subject to change with more info. However, for us onchain users, the main issue was that Binance prices their wrapped assets at spot market price and not underlying value price. This is a known flaw that many borrow/lend protocols have identified, such as Solend and Aave, and is the reason many loopers were largely okay. Using secondary market pricing as an oracle for a token backed by real dollars (or SOL with an LST) makes no sense -> given the market price != the real price. Crypto has too many venues, so why should the Binance market for USDe be the bearer of truth when in reality USDe is always backed by real value. The mint/redeem price should be the bearer of truth not Binance. Binance’s unified-margin stack was marking key collateral (USDe, BNSOL, wBETH) off its own spot order books. In the dislocation, those local markets detached from underlying value, WBETH printed in the $400s at one point while ETH itself traded multiples higher, and USDE/BNSOL also plunged on Binance versus external venues. Quoting for USDE was terrible and essentially caused anyone who was long an asset with usde as the collateral to get liquidated. Okay, so if Binance was a big contributor to the mass liquidations onchain, how did Binance cause me to get liquidated on other perp DEXs? Because in crypto perps, fair value is synthesized from a small set of anchors, and Binance is still the heaviest anchor. Most perps, CEXs and DEXs, blend top-venue spot feeds and many DEX oracles ultimately reference those same feeds. When the largest venue’s API stalls, Binance, and its local spot marks misprice wrapped collateral, two things happen in the market maker (MM) stack: (1) inventory and margin models start screaming false signals (your collateral is supposedly worth 40–80% less when it is not), and (2) the external “mid” used to place quotes, skew sizes, and choose venues no longer feels trustworthy. With no defensible mid, MMs do the only rational thing: pull size, push their quotes way back, or go dark entirely until they can recompute risk. This is why some perp DEXs, those that held up better than others, still couldn’t fill some users’ bids. There were no market makers willing to quote. That gap shows up to end users as “spreads went crazy” and “can’t get filled,” even on DEXs that did remain online. It’s not that no one wanted to make markets; it’s that you can’t price what you can’t mark. In a unified-margin regime, collateral marks flow straight into the math for liquidation thresholds. If WBETH is valued off a thin, dislocated spot print rather than its redeemable ETH value, your cross-portfolio buffer can vanish in seconds, even if your directional book is fine. This is why many basis (delta neutral) traders still got wrecked, especially those with high leverage as they quickly learned about ADL.Forced liquidations then hit books already thin on the bid, pushing prints further from fair and propagating the error into everyone else’s “index” via cross-venue references, which sounds good in theory, but as explained above, is flawed when the leader goes bust. From a market maker’s (MM) point of view, the decision tree was brutal but quite an easy decision. Try to make a market but risk going bust or pull liquidity? When your collateral present value (PV) and cross-venue mid diverge from reality, value at risk (VaR) explodes and your kill-switches trip. This compounded with API/chain congestion, wallet throttles, and venue halts. MMs often couldn’t move collateral or lay off basis even if they noted the mispricing and wanted to get out. This is why some MMs fared better than others. Lastly on MMs, contrary to CT, market making in that type of environment is massively -ev for these market makers. That’s why many desks yanked liquidity late, widening spreads further, and lived to re-enter once feeds normalized and collateral marks were patched. On venue performance: it’s fair to note @HyperliquidX remained up (users are still hot about ADL), @Lighter_xyz was down for ~4.5 hours, @paradex was down for ~1 hour, and several centralized venues had intermittent issues amid the cascade. But uptime really isn’t the primary point here. It is reference/pricing/quote integrity and microstructure flaws on Binance’s side and other venues over-indexing on Binance’s prices. How is a team, Binance, that has been in the industry for 8 years still mispricing assets? They price their wrapped assets at spot market price and not underlying value price. Marking them to thin spot prints instead of underlying redemption value is a first-principles error. If the system’s “price of record” is wrong, the rational market-maker response is to just pull all liquidity, which is smart for them, and even the best-engineered matching engine can’t conjure fills out of risk-model uncertainty. Zooming out: could a big Binance-focused MM have gone belly-up? I think so. The combination of (a) collateral PV shock from mis-marked wrapped assets, (b) inability to mobilize margin, and (c) stale/broken APIs is exactly the recipe that flips well-behaved delta books into forced-liquidation machines. We’ll know more when desks publish their post-mortems; for now, my opinion is that this largely stems from Binance. Last, on near-term flow and the macro overlay: Monday and Tuesday pose serious mark-to-market risk for traditional funds, as dealers who manage margin will need to crystallize losses. A surprise détente headline can always rip risk higher and, perversely, with a large cohort of six- to eight-figure crypto traders now structurally sidelined, the pain trade may indeed be up. However, I also see the other side: “Hey, the market puked; I’m piling all my cash in for the meteoric rise and a resumption of ‘up-only season,’” only to watch the wick get filled in the direction no one wants to see. Either way, I think in order to step into the market with bids in a meaningful way you need to assume Trump and Xi laugh it off and shake hands, which who knows, might already be happening.