Newly unsealed court documents reveal that stablecoin issuer Circle barred Malta-based crypto investment fund Heka from its platform in late 2023, igniting renewed debate over a potential ban on Tether. Court filings show Circle took action after identifying suspicious trading activity by Heka during the Silicon Valley Bank (SVB) crisis, a period when USDC temporarily lost its one-dollar peg.
Circle details suspicious redemptions amid SVB turmoil
Circle, known for developing the USD Coin (USDC) stablecoin, stated that it noticed large and irregular redemptions of USDC after SVB went bankrupt. At that time, USDC traded below parity, and Heka reportedly redeemed significant amounts of USDC to obtain US dollars. The filings indicate that Heka quickly converted the proceeds into Tether’s USDT, enabling USDT to increase its market share as investors sought alternatives during the USDC uncertainty.
Stablecoins serve as key infrastructure in crypto markets, underpinning decentralized finance (DeFi), international payments, and trading platforms. When leading issuers face operational disruptions or regulatory intervention, liquidity can suffer, investor confidence may weaken, and the broader digital asset ecosystem can experience instability.
Circle attributed Heka’s activity to more than just regular arbitrage, stating that these trades appeared designed to exploit rapid price movements and market volatility during the SVB crisis.
Arbitration ruling supports Circle’s restrictions
Legal documents indicate that prior to the disputed events, Heka had invested $800 million through Circle’s platform. Following the restriction, Heka initiated arbitration, arguing that Circle’s actions interfered with its trading strategy and resulted in a loss of nearly $49 million.
The arbitrator ruled in Circle’s favor, determining that Heka had acted in bad faith. Consequently, the court upheld the platform ban and ordered Heka to pay Circle’s legal fees.
Mini dictionary: Circle is a US-based fintech company that issues USD Coin (USDC), a regulated stablecoin pegged to the US dollar and backed by reserves.
Discussion around a potential Tether ban has intensified after the court justified Circle’s measures as necessary for protecting the stability of USDC and preempting market manipulation.
| Platform | Stablecoin | Market Focus | Notable Event (2023) |
|---|---|---|---|
| Circle | USDC | Regulatory compliance, institutional adoption | USDC temporarily depegged during SVB crisis |
| Tether | USDT | Global market dominance | Gained share as investors switched from USDC |
| Heka Fund | USDC, USDT | Crypto investment | Barred by Circle after high-value USDC redemptions |
The case spotlights the growing need for robust surveillance and compliance mechanisms in the stablecoin sector as regulatory scrutiny increases, particularly in the aftermath of significant market disruptions.
Heightened compliance as stablecoin competition tightens
The newly released court materials offer a rare look at the competitive dynamics between Circle and Tether, the leading stablecoin issuers by market capitalization. While Tether’s USDT dominates trading volumes worldwide, USDC has carved a niche among compliance-focused institutional users. The recent ban against Heka underscores how stablecoin rivalry now includes not just pricing competition but also platform restrictions and liquidity management strategies.
Regulatory experts emphasize that disputes such as this highlight the increasing importance of monitoring and compliance in the stablecoin space. Although Tether itself was not directly implicated in the transactions, growing attention from global regulators is prompting exchanges, investors, and issuers to bolster their market surveillance efforts as standards evolve.




