Tether, the Hong Kong-based stablecoin issuer, has initiated a voluntary wallet-freezing policy to strengthen cooperation with law enforcement and regulatory agencies. Since Dec. 1, Tether has been offering secondary market controls to freeze activity connected with sanctioned persons on the US Office of Foreign Assets Control (OFAC) Specially Designated Nationals (SDN) List. This policy aims to supplement existing security protocols and work more closely with global regulators. Wallets previously added to the SDN List have already been frozen by Tether, a move that contradicts the company's previous positions on the matter. Tether's market capitalization currently stands at $90 billion, holding nearly 70% of the market.