朋友推荐了一个讲 market making 的视频: "A 20-Year Veteran Reveals the World of Options Market Making" 一个 20 年期权做市老手讲得很实在: 做市不是猜方向. 核心是: - 估 fair value - 双边报价 - 管 inventory - 识别 informed flow - 快速更新报价 - 别让一笔错单吃掉一天利润 我觉得对理解预测市场也很有用. 很多时候我们不是在问"这场谁会赢", 而是在问: 这个盘口现在的价格, 和真实概率比, 是不是便宜? 以及: 我是赚 spread, 还是被更快的人挑中了过期报价? 视频链接:

「黑龙江约两百名下岗教师在省教育厅集会，要求落实养老保障（2026.07.22）」7月22日，黑龙江省约200名下岗教师前往省教育厅集体维权，要求当局为尚未达到法定退休年龄、没有社保账户的下岗教师，补缴其在岗期间的养老保险；要求以灵活就业身份参加企业职工养老保险的下岗教师，同样享受教龄补贴，或将教龄认定为工龄并纳入养老保险视同缴费年限；同时要求提高“86群体”老教师的教龄补贴标准。 “Around 200 Laid-Off Teachers Rally at Heilongjiang Provincial Education Department, Demanding Pension Protections (July 22, 2026)” On July 22, around 200 laid-off teachers in Heilongjiang Province went to the provincial education department to collectively defend their rights. They demanded that the authorities make up the pension contributions owed for laid-off teachers who have not yet reached the statutory retirement age and do not have social security accounts. They also called for laid-off teachers enrolled in the enterprise employee pension system as flexible workers to receive the same teaching-service allowances, or to have their years of teaching recognized as years of service and counted toward their deemed pension contribution period. In addition, they demanded an increase in the teaching-service allowance provided to veteran teachers belonging to the “1986 group.”