Wu Shuo learned that, according to BlockSec Phalcon monitoring, the decentralized trading protocol Futureswap on the Arbitrum chain was attacked a few hours ago, resulting in a loss of approximately $395,000. The attacker exhausted funds by repeatedly executing changePosition operations and withdrew a large amount of USDC. Since the contract is not open source, the exact cause still requires further investigation, but preliminary analysis suggests that the incident may be related to an unexpected stableBalance accounting change during position updates, which led to USDC being incorrectly released during reducing or closing positions. Currently, the security company is trying to contact the project team but has not received a response yet.