Stablecoins are sometimes referred to as the foundation of decentralised finance because they have a set value of $1.00. They function as digital dollars, allowing investors to transfer funds between exchanges without converting to currency. Because of their stability, they are vital for trading, lending, and storing wealth in the cryptocurrency market. A depeg occurs when a stablecoin’s market price deviates significantly from its planned peg, which is usually the US dollar. Instead of trading at $1.00, a depegged stablecoin could fall to $0.95, $0.88, or perhaps less. This divergence poses an immediate financial risk to anyone who owns or uses that stablecoin as collateral.
Although the stablecoin market has surged to a record $300 billion as of late 2025, nearly doubling early forecasts of $160 billion, these assets remain susceptible to volatility as demonstrated by the significant depegging events of USDe and FDUSD this year. Understanding depegs enables investors to preserve their cash and make informed decisions during market duress.
How Do Stablecoins Stay Pegged?
Before you can understand why stablecoins break their peg, you need to know how they stay stable. To keep their value at $1.00, different types of stablecoins work in different ways. Different mechanisms each have their own pros and cons that affect depeg risk.
Mechanism | Examples | Pros | Cons |
Fiat-Backed | Highest liquidity and safest during market crashes. Fully compliant with 2025 GENIUS Act transparency rules. | Centralised control allows for account freezing. US issuers are legally barred from paying interest directly to holders. | |
Crypto-Collateralised | Fully decentralised and resistant to traditional bank failures. Highly transparent with all reserves verifiable on-chain. | Requires “locking up” more capital than you receive. High risk of liquidation during rapid market drops like the October crash. | |
Delta-Neutral / Algorithmic | Maximum capital efficiency with no over-collateralisation. Can generate high yields through affiliate rewards programs. | Extreme structural risk. Vulnerable to “liquidation cascades” as seen during the $0.65 USDe depeg in October 2025. |
Why Do Stablecoins Depeg?
Liquidity crises are the most typical reason for stablecoin depegs in the market. When large sell orders flood exchanges quicker than buy orders can absorb them, prices fall below $1.00. This frequently occurs during broader market panics, when everyone tries to exit their positions at the same time.
Reserve concerns develop when it is unclear if an issuer has sufficient backing assets. Concerns about the inability to redeem tokens can arise from news reports, failed audits, or banking problems. Even temporary uncertainty can prompt traders to sell aggressively, driving the price below the peg.
Key Depeg Triggers:
- Smart contract vulnerabilities and design flaws in algorithmic systems
- Banking failures affecting reserve custody (like the SVB collapse)
- Cascading liquidations in DeFi lending protocols
- Regulatory crackdowns or legal uncertainties
- Geopolitical tensions causing market-wide volatility
- Loss of confidence due to transparency issues
- Rug pulls and malicious exit scams, where developers intentionally drain liquidity from the pools supporting the peg or vanish with the collateral altogether.
The infamous “death spiral” of TerraUSD revealed how algorithmic designs can collapse spectacularly when stressed. External market shocks from geopolitical events, such as US-China trade disputes in 2025, put stablecoin resilience to the test across multiple protocols.
Also read: What Is a Rug Pull in Crypto?
Historical vs. Recent Depeg Events
Event | Year | Stablecoin | Lowest Price | Cause | Outcome |
Terra Collapse | 2022 | UST | ~$0.00 | Algorithmic failure | Total collapse |
SVB Banking Crisis | 2023 | USDC | $0.88 | Reserve exposure | Recovered |
Ethena Liquidation | Oct 2025 | USDe | $0.65 | Liquidation spiral | Partially recovered |
Curve Pool Imbalance | 2023-2025 | USDT | $0.98 | Liquidity crunch | Temporary |
The TerraUSD (UST) Collapse - May 2022:
The Terra/Luna collapse remains the most catastrophic stablecoin failure in crypto history. UST dropped from $1.00 to nearly zero in just 72 hours, wiping out approximately $40 billion in market value. The algorithmic design created a death spiral where declining confidence fed into more selling pressure, ultimately destroying both UST and its sister token LUNA.
USDC Depeg - March 2023:
USDC’s depeg to $0.88 in March 2023 taught investors about counterparty risk in fiat-backed stablecoins. Circle, USDC’s issuer, had $3.3 billion of reserves stuck in Silicon Valley Bank when it collapsed. The stablecoin recovered within days once regulators ensured depositors would be made whole, but the incident showed that even “safe” stablecoins carry banking risk.
Ethena USDe Incident - October 2025:
The October 2025 Ethena USDe incident highlighted vulnerabilities in synthetic delta-neutral stablecoins during extreme volatility. USDe briefly dropped to $0.65 on some exchanges as cascading liquidations overwhelmed the hedging mechanism. While USDe partially recovered, the event raised serious questions about the sustainability of yield-bearing algorithmic stablecoins.
Tether (USDT) Fluctuations:
Tether has experienced multiple brief deviations to $0.98 during periods of intense market stress and liquidity imbalances. These “soft depegs” typically resolve within hours as arbitrageurs step in to restore the peg by buying discounted USDT and redeeming it for $1.00.
The Impact of Depegging on Investors
If you sell a depegged stablecoin on the open market for less than $1.00, you will immediately incur a direct capital loss. When you sell a stablecoin at $0.90, you immediately lose 10% of your dollar worth. This loss is irreversible once you execute the trade and cannot be reversed.
How Depegs Affect Your Portfolio:
- Immediate capital loss if sold below peg value
- Forced liquidations on DeFi lending platforms
- Chain reaction selling across connected protocols
- Loss of purchasing power for planned trades
- Psychological impact leading to panic decisions
- Potential tax implications depending on jurisdiction
DeFi liquidations provide a much greater danger to investors using stablecoins as loan collateral. If you borrowed USDC on Aave and it depreciates to $0.88, your collateral value reduces immediately. The protocol may liquidate your entire investment to protect lenders. This creates a cascade effect where liquidations increase selling pressure, sending the price even lower.
Because these losses can be substantial, it is crucial to understand how to recover the tax deducted during these transactions.
How to Protect Yourself
Protection Strategy | Implementation | Risk Reduced |
Diversification | Hold 2-3 different stablecoins | Single-point failure |
Transparency Priority | Choose coins with real-time attestations | Reserve uncertainty |
On-chain Monitoring | Track reserve health and redemption rates | Early warning signs |
Collateral Management | Keep loan-to-value ratios conservative | Liquidation risk |
Diversifying among various stablecoin types mitigates the risk associated with reliance on a single point of failure. Rather than maintaining a full allocation in USDT, it may be prudent to diversify holdings among USDC, DAI, and USDT to mitigate risk. This strategy guarantees that the depegging of a single stablecoin does not jeopardise the integrity of your entire cash position.
Transparency should serve as the principal criterion for selecting stablecoins for long-term holdings. Emphasise stablecoins that undergo regular third-party attestations, maintain transparent reserve compositions, and adhere to regulatory frameworks such as MiCA in Europe. Coins that issue monthly proof-of-reserves reports exhibit a commitment to upholding appropriate backing ratios.
Monitoring on-chain data offers early indicators prior to the escalation of depegs into significant market events. Monitor metrics such as redemption rates, reserve wallet balances, and price discrepancies across exchanges utilising blockchain explorers. Uncommon trends in these metrics frequently occur prior to significant depeg events by several hours or days.
When utilising stablecoins as collateral in DeFi, it is advisable to uphold conservative loan-to-value ratios that remain below the maximum limits set by the protocol. A 50% loan-to-value ratio, as opposed to 80%, provides a margin of safety in the event of a slight depreciation of your collateral. This additional cushion can avert automatic liquidations amid temporary price fluctuations.
Conclusion
Stablecoin depegs are a rare but significant systemic risk that all cryptocurrency investors should be aware of and prepared for. While “stable” appears in the name, these assets necessitate continual monitoring and risk management techniques. The events of 2022–2025 showed that no stablecoin architecture is totally resistant to failure. Understanding the mechanisms underlying various stablecoin kinds allows you to analyse the relative risk levels in your portfolio. Diversification, transparency prioritisation, and active monitoring are the foundations of stablecoin risk management.
When depegging events cause liquidations or panic selling, assessing the ensuing tax liabilities becomes highly complicated. KoinX makes crypto tax filing easier by automatically recording all of your stablecoin transactions, depegs, and associated gains or losses. Whether you’re dealing with India’s VDA rules or foreign tax regulations, signing up on KoinX today guarantees proper reporting during turbulent market occurrences.
Frequently Asked Questions
Is a Stablecoin Depeg Considered a "Tax Loss"?
Yes. In most jurisdictions, like the US (IRS) or UK (HMRC), stablecoins are treated as capital assets. Selling a depegged stablecoin for less than your purchase price creates a realised capital loss. This loss can offset capital gains from other investments or even reduce ordinary income up to certain limits. The IRS in the US and HMRC in the UK explicitly recognise crypto-to-fiat sales as taxable disposals.
Does Swapping One Stablecoin For Another Trigger a Tax Event?
Yes. Crypto-to-crypto swaps are treated as disposal of one property for acquisition of another in most countries. You must calculate the fair market value difference between your cost basis and the new coin received. This applies even when swapping between two assets both pegged to $1.00 in theory. The tax event occurs at the moment of the swap regardless of eventual repeg.
Can I Claim a "Worthless Asset" Deduction if a Stablecoin Goes to Zero?
Yes, but it’s tricky. Claiming a worthless asset deduction requires proof of actual disposal. Most investors sell the worthless token for a nominal amount like $0.01 to officially realise the loss. Some use specialised “dusting” or “burning” services that provide tax documentation for worthless crypto disposal. Simply holding a worthless stablecoin without disposing of it generates no deductible loss event.
What is The Biggest Risk of a "Soft Depeg"?
The biggest risk is not the 2% price drop itself but rather the liquidation cascade it can trigger. If you have an active loan on Aave, Compound, or other DeFi platforms using that stablecoin as collateral, even small depegs matter. A drop from $1.00 to $0.98 reduces your collateral value by 2% instantly. If your loan-to-value ratio was already near the liquidation threshold, this triggers automatic position closure.
Forced liquidations are taxable events in nearly all jurisdictions. The protocol sells your collateral at the worst possible time during peak market stress. You realise losses at depressed prices while still owing the original loan amount. This double impact explains why soft depegs cause more damage than their small percentage drops suggest.
How Do I Track the "Cost Basis" of Stablecoins During a Depeg?
Tracking the cost basis during depegs becomes extremely difficult because prices vary wildly across different exchanges simultaneously. One exchange might show $0.95 while another shows $0.88 for the same stablecoin at the same moment. Tax authorities typically require using the fair market value at the specific exchange where your transaction occurred.
Automated tax platforms like KoinX solve this problem by integrating with multiple exchanges and tracking transaction timestamps. The platform records the exact price at your specific exchange when you bought, sold, or swapped. This precision is essential for accurate tax reporting, especially during volatile depeg events. Manual tracking almost always results in errors during periods of rapid price fluctuation.
Are Fiat-backed Stablecoins (USDT/USDC) Safer Than Algorithmic Ones?
Fiat-backed stablecoins generally carry lower depeg risk due to direct dollar backing and stricter regulatory oversight. USDC operates under New York’s BitLicense and now complies with the US GENIUS Act of 2025 requirements. USDT and USDC hold the majority of reserves in short-term US Treasury bills and cash equivalents. These regulatory frameworks and transparent backing reduce but do not eliminate depeg risk entirely.
Algorithmic and synthetic stablecoins like USDe rely on market arbitrage, hedging strategies, and smart contract mechanisms instead. These designs work well during normal market conditions but can fail catastrophically during “black swan” events. The October 2025 USDe liquidation spiral and the 2022 UST collapse both demonstrated this vulnerability. While algorithmic stablecoins offer higher yields, they carry significantly more systemic risk than fiat-backed alternatives.
