On June 21, 2017, Ether briefly traded for as little as $0.10 on GDAX after a large market sell swept through available bids, triggering stop-loss sales and margin liquidations. The episode was startling, but its mechanics were not mysterious: when nearby buy orders are too thin to absorb a large sale, automated selling can deepen the fall. GDAX said its matching engine worked as intended and its initial investigation found no indication of wrongdoing or account takeover.
What happened on GDAX
In its June 2017 account, GDAX placed the event at 12:30 p.m. Pacific on June 21, on the ETH-USD order book. The exchange said a multimillion-dollar market sell consumed bids from $317.81 down to $224.48, a 29.4% move through the available book. It then attributed further selling to approximately 800 stop-loss orders and margin funding liquidations; Ether briefly traded as low as $0.10. These figures are GDAX’s published account, not an independent reconstruction of every order or fill. GDAX’s June 2017 trading update
The initial drop and the subsequent cascade are distinct parts of the explanation. A market order seeks execution against available orders; if nearby bids are limited, a large sell can fill at progressively lower prices. Once prices reach stop triggers, resulting sell orders can add supply. A margin liquidation can also force a position to close, producing more selling. GDAX described these processes as compounding the original move.
Why a market move can become a cascade
Order-book depth determines price impact
The quoted price is not a promise that any amount of Ether can be sold there. An order book contains bids at different prices and quantities. A large market sell can consume the best bid and continue down the book until the order is filled or no further matching bids are available. The less depth close to the market price, the more a given order can move the execution price.
#1 Best Overall
Stops and liquidations can add forced selling
A stop-loss is an instruction tied to a trigger price; depending on the venue and order settings, reaching the trigger may send a market sell into the book. A leveraged position can also be liquidated when it no longer meets the platform’s margin requirements. These mechanisms can turn a price decline into additional sell orders, but their precise trigger and execution rules vary by platform and order type. GDAX’s account attributes roughly 800 stop-loss orders and margin funding liquidations to this particular event; it does not establish that all exchanges handle them identically.
What is established—and what is not
GDAX executive Adam White wrote that “Our matching engine operated as intended throughout this event and trading with advanced features like margin always carries inherent risk.” The exchange also said its initial investigation found no indication of wrongdoing or account takeover. Those statements describe GDAX’s findings and explanation; the episode alone is not proof of manipulation, nor does the available event account establish an independent, fill-by-fill causal reconstruction. Omega One’s contemporaneous analysis treated the crash as a warning about order-book depth and liquidation rules amid rapid crypto-market activity. That is an interpretation of the event, rather than an independently established finding about each trade.
Rank #2
- Ideal for Gifting
- Ideal for a bookworm
- Compact for travelling
How GDAX and Coinbase responded
Trade finality and customer credits
GDAX’s first update said properly executed trades were final under its rules. Coinbase later said it would establish a process to credit customers whose stop-loss or margin-call events were directly caused by the rapid move. The company said profitable trades during the event would be honored rather than reversed. GDAX’s follow-up update and TechCrunch’s June 24, 2017 report
Historical order controls
On January 11, 2018, Coinbase announced GDAX order maximums intended to limit potential slippage and a “limit-only” market state: customers could place limit orders, but not market orders, while that state was active. The company said the changes would take effect January 16, 2018. This is a record of measures announced at that time, not evidence of GDAX or Coinbase’s settings today. Coinbase’s January 2018 market-structure update
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWhat crypto traders can learn from the episode
The crash illustrates why a visible market price, an order type, and a leveraged position are not interchangeable measures of risk. Before trading, a person can use these questions to understand the exposure involved:
- Depth and order size: How much liquidity is available near the current price, and could an order large relative to that depth sweep through several price levels?
- Order limits and access: Does the venue impose single-order maximums, or can it temporarily restrict market orders? Coinbase’s 2018 announcement addressed these two controls for GDAX at that time.
- Stop execution: What happens when a stop trigger is reached—does it create a market order, and what execution risks follow if the book is moving quickly?
- Leverage and liquidation: At what point can a position be forcibly closed, and how could liquidation orders interact with a falling market?
- Trade and remedy rules: How does the venue define final trades, and does it describe any customer-credit process for exceptional events?
The GDAX incident does not show that every crypto venue has the same safeguards or that a similar cascade is inevitable. It does show how limited nearby liquidity, order execution, stop triggers, and leverage can interact under stress—and why understanding each venue’s specific rules matters.
Quick Recap
Best Value
- It can be a gift option
- Comes with secure packaging
- Helpful in various ways
Rank #4
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
