美股 AI 日报（2026.10.23）：Nebius 向花旗取得 35 亿美元高级担保融资

Kalshi is preparing to enter the institutional inflation derivatives market with proposed exchange-traded futures contracts linked to the U.S. Consumer Price Index (CPI). According to Bloomberg's October 23, 2026 report, the prediction-market operator is targeting a December launch for futures tracking both headline CPI and core CPI, which excludes food and energy. The company has engaged Michael Ashton, a former Barclays inflation trader known as the “Inflation Guy,” to help design the contracts and attract institutional interest from major banks and hedge funds

DeFi price manipulation attacks have reached a new reported annual high in 2026, exposing persistent weaknesses in how decentralized financial protocols value assets, manage collateral, and respond to abnormal market conditions. According to DefiLlama data cited by RootData and other industry publications, 43 price manipulation incidents had been recorded by October 21, surpassing the previous full-year high of 27 incidents in 2022. Reported losses associated with the 2026 incidents totaled approximately $199 million, although their distribution reveals a more complex security picture than the headline count suggests

Payward, the parent company of Kraken, is pursuing a regulated pathway for bringing onchain perpetual futures to U.S. customers through Hyperliquid's HIP-3* infrastructure. The company announced its plan on September 16, 2026, while Hyperliquid's October 26 update drew renewed attention to the proposed permissioned market architecture. Under the arrangement, Bitnomial would operate the exchange and clearing functions, NinjaTrader Clearing would maintain customer accounts, and Hyperliquid would supply the blockchain-based order book used to execute and record transactions