The Incident
On August 21, 2019, the cryptocurrency market experienced one of its most severe single-day selloffs of the year. Bitcoin plunged roughly $700 during early morning trading sessions, settling near $10,138 — a 5.8% decline in just 24 hours. Ethereum fell to $186.89, mirroring the losses. The overall market capitalization of all cryptocurrencies collapsed to approximately $263 billion, and the Crypto Fear and Greed Index dropped to 5, the lowest reading ever recorded in the history of the index. For decentralized finance protocols running on Ethereum, this was the first real stress test of their young existence.
MakerDAO, the protocol behind the DAI stablecoin, found itself at the center of this storm. At the time, MakerDAO was still operating its Single-Collateral DAI system — known as SAI — where Ethereum served as the only collateral type. Governance polls had been actively running since early August 2019, with Poll 16 deployed on August 5 marking the beginning of a more structured governance framework. These polls were not abstract exercises. They directly influenced parameters that would determine whether the protocol could survive a rapid ETH price decline of this magnitude.
Technical Post-Mortem
The mechanics of Single-Collateral DAI meant that every DAI in circulation was backed by ETH locked in a Collateralized Debt Position, or CDP. When ETH dropped nearly 6% in a single day, a cascade of liquidations became a real possibility. The protocol’s liquidation ratio — the collateralization threshold below which positions are automatically liquidated — was set at 150%. With ETH trading around $186, any CDP opened when ETH was above roughly $200 moved dangerously close to that threshold.
MakerDAO’s smart contract architecture handled the liquidation process through auction mechanisms. When a CDP fell below the liquidation ratio, the system seized the collateral and sold it to cover the outstanding DAI debt plus a liquidation penalty. On August 21, the volume of CDPs approaching their liquidation thresholds increased significantly. The stability fee, which had been adjusted upward in preceding weeks through governance votes, sat at levels designed to discourage excessive leverage — a decision that proved prescient during this crash.
The protocol’s price feeds, powered by a decentralized oracle network, relayed real-time ETH prices to the smart contracts. These oracles functioned without interruption throughout the crash, ensuring that liquidation triggers fired accurately. The key technical risk — oracle failure during extreme volatility — did not materialize, a validation of MakerDAO’s multi-oracle design philosophy.
Governance Impact
The governance activity during this period was intense. MakerDAO’s decentralized governance framework was still in its formative stages, with polls being deployed regularly from August 2019 onward. Token holders were voting on critical parameters including stability fees, debt ceilings, and risk assessments for potential new collateral types. The Multi-Collateral DAI upgrade, which would eventually allow multiple asset types as collateral instead of just ETH, was being actively discussed and voted on through these governance polls.
The crash underscored a fundamental governance challenge: response time. In a decentralized system, emergency parameter changes require governance votes, which take time. During the August 21 selloff, this latency was manageable because the decline, while sharp, did not trigger a systemic liquidation event. However, the incident reignited debates about the need for faster governance mechanisms — debates that would eventually lead to the creation of MakerDAO’s Emergency Shutdown feature and more agile executive vote processes.
Voter participation during this crisis period was notably high for the ecosystem’s standards. MKR token holders recognized that their votes on stability fees and risk parameters had direct, immediate consequences for the protocol’s solvency. This was one of the earliest real-world demonstrations that decentralized governance could function under pressure, even if imperfectly.
TVL Shifts
Total Value Locked in MakerDAO during August 2019 reflected the broader market contraction. As ETH prices fell, the dollar-denominated TVL declined in parallel, even though the amount of ETH locked in CDPs remained relatively stable. This created a paradox: the protocol was functioning correctly from a technical standpoint, but its headline TVL metric looked increasingly fragile to outside observers.
Other DeFi protocols felt the impact as well. Compound Finance, which had launched its money market protocol earlier in 2018, saw reduced lending activity as traders deleveraged. Uniswap, still in its v1 incarnation, experienced a notable shift in trading volumes — with USDT pairs gaining significant market share as traders sought stability amid the chaos. DEX user activity had actually peaked at 48,934 monthly users in August 2019, suggesting that despite the fear gripping spot markets, decentralized trading infrastructure was finding genuine product-market fit.
The broader DeFi TVL picture in mid-2019 was modest by later standards — the total across all protocols measured in the low hundreds of millions of dollars. MakerDAO commanded the lion’s share, with its SAI system representing the single largest concentration of value in decentralized finance at the time.
Long-Term Prognosis
The August 21, 2019 crash served as a crucible for MakerDAO and the broader DeFi ecosystem. The protocol survived intact, liquidations processed correctly, governance functioned, and no user funds were lost due to smart contract failures. For a system that was essentially an experiment in decentralized monetary policy, this was a significant milestone.
The lessons from this period directly shaped the Multi-Collateral DAI architecture that launched in November 2019. By diversifying collateral types beyond just ETH, the protocol reduced its exposure to single-asset volatility — the exact vulnerability exposed during the August crash. The governance experience gained during this crisis informed the development of more sophisticated risk frameworks and faster executive vote mechanisms.
Looking at the broader picture, August 2019’s record-low fear index of 5 coincided with the very early stages of what would later be called “DeFi Summer.” The infrastructure being built and stress-tested during this fearful period — MakerDAO’s governance, Compound’s money markets, Uniswap’s automated market making — would form the foundation for the explosive DeFi growth of 2020. Sometimes the most important building happens when nobody is watching, and few were watching DeFi in August 2019 when fear ruled the market.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Past performance of DeFi protocols does not guarantee future results. Always conduct your own research before interacting with decentralized finance platforms.
fear index at 5 is insane. that august 2019 dump was the first real defi stress test and makerdao barely held together with single-collateral sai
single collateral dai was so fragile back then. one big eth wick and the whole system could have gone underwater
single collateral was always a ticking time bomb. multi-collateral dai launching a few months later was what actually saved the protocol
fear index at 5 was the buy signal of the decade. btc at 10k, eth at 186. if you werent terrified you werent paying attention
fear index at 5 and makerdao was basically the only defi protocol that mattered. now theres 500 protocols and most of them would crumble in the same scenario
most of those 500 protocols wouldnt exist without makerdao proving the model. comparing them is unfair but the fragility point stands
makerdao was the only protocol because it was the only one that existed. 2019 defi was maker and a handful of amms. the comparison to todays 500 protocols isnt fair
fear index at 5 means literally everyone was terrified. thats when the best entries happen if you can stomach it