遗失的世界

一 |     在我们做量化交易时，数据是所有策略的基石，不论是回测，还是我们的某些策略都需要用上历史数据，因此怎么在对自己的量化软件中补充数据是非常重要的，下面这篇文章将详细说明怎么做数据补充以及如若出错该怎么处理。一、补充数据库到底是为了做什么？QMT的“补充数据”功能，本质上是将交易所的历史行情数据提前下载并加密保存在你的本地电脑中。它的核心作用体现在以下三个方面：保障回测数据的完整性与高效性：回测的本质是遍历固定的...。    (ECNS) -- Investors in the online tranche of Unitree Robotics’ IPO on Shanghai’s STAR Market failed to pay for 8,734 allotted shares, while all shares in the offline tranche were fully subscribed and paid for, according to results announced Thursday evening.     Online investors paid for 9,698,266 shares, while offline investors paid for 22,650,148 shares.        The sponsor and lead underwriter will take up all 8,734 unpaid shares, valued at about 1.32 million yuan ($195,000), accounting for roughly 0.02% of the total offering.    Unitree priced its IPO at 150.80 yuan (about $22.2) per share and offered approximately 40.45 million shares, raising around 6.10 billion yuan ($904.5 million). The final online allotment rate was just 0.0181%, prompting comparisons to “winning the lottery.”     Strategic placement results also showed that DeepSeek was allocated 933,399 Unitree shares, worth approximately 140.76 million yuan ($20.9 million).    (By Helen Mo, intern Yang Hongran)                    。