In the context of financial markets, an Overnight Position refers to a trade or investment that is held for a period of time that spans more than one trading day. In the US market, overnight positions are common in the futures and forex markets, as well as in other financial instruments such as options and swaps.Overnight positions can be either long or short, depending on the direction of the trade. A long overnight position means that the trader has bought a financial instrument and is holding it with the expectation that the price will rise. A short overnight position means that the trader has sold a financial instrument and is holding it with the expectation that the price will fall.Overnight positions carry the risk of additional costs, such as financing costs and the risk of adverse price movements. These risks are typically managed through the use of margin and other risk management tools.In the US market, overnight positions are typically subject to regulations and rules set by the exchanges and regulatory bodies that oversee the various financial markets. These rules may include requirements for margin and other collateral, as well as rules related to the use of leverage.In summary, an overnight position is a trade or investment that is held for a period of time that spans more than one trading day. It is common in the US market and carries the risk of additional costs and the need to manage risk through the use of margin and other tools. It is subject to regulations and rules set by exchanges and regulatory bodies.