老鼠仓是一种营私舞弊，损公肥私的腐败行径，具体指庄家在用公有资金拉升股价之前，先用自己个人（机构负责人，操盘手及其亲属，关系户）的资金在低位建仓，待用公有资金拉升到高位后个人仓位率先卖出获利，与腐败干部别无二致，取自谚语：硕鼠硕鼠，无食我黍，故名老鼠仓，古代统治者又视老百姓为草民，鼠辈，而金融领域从基金经理到证券分析师，大多是受过高等教育的金领白领，对金融业者中的此类行为视为老鼠之举，故有此说。

我国法规规制“老鼠仓”行为类型有三种：一是直接利用未公开信息从事交易，二是泄露未公开信息，三是明示、暗示他人从事交易。

关于老鼠仓的翻译，可以直接将其直译为rat trading，如以下为Caixin Global对老鼠仓的解释：

So-called “rat trading” (老鼠仓 lǎoshǔ cāng) includes all trades of shares, options and other securities that play off nonpublic knowledge of a large impending transaction. In one recent case, which happened to involve two Mr. Tus, several years of dodgy trading were masterminded via prepaid, easily disposable cellphones and ex-girlfriends’ accounts. Such brokers are called “rats” because of their rodent-like modus operandi: They’re like little rats (老鼠) enjoying the spoils of a well-stocked barn (仓), which is also the word for a financial position in Chinese. Regulators filed 13 such cases in 2017 and 29 in 2016.

或者还可以将老鼠仓翻译为front-running，因为西方市场并没有老鼠仓这样说法，他们对于类似的行为常用front-running抢跑来表述，如维基百科对于front-running的释义如下：

Front-running is trading stock or any other financial asset by a broker who has inside knowledge of a future transaction that is about to affect its price substantially. A broker may also front-run based on insider knowledge that their firm is about to issue a buy or sell recommendation to clients that will almost certainly affect the price of an asset.

以下为相关双语示例，供参考：

China’s finance regulators have uncovered 80 billion yuan (US$11.7 billion) worth of trade volume related to a common form of misconduct known as “rat trading” since 2014, as the country has strengthened supervision of fund managers operating in its US$7 trillion stock market.

中国的股市规模已达7万亿美元。自2014年以来，中国不断加强对基金管理人的监管，证监会已启动多起老鼠仓调查，涉案交易金额约800亿元（约117亿美元）。