"The change of API crude oil inventory refers to the change of US crude oil inventory announced by the American Petroleum Institute (API). The change of API crude oil inventory is an important indicator in the oil market, which can reflect the supply and demand situation of the US oil market and the level of crude oil inventory. At the same time It can also affect international crude oil prices.

API publishes weekly changes in U.S. crude oil inventories, including crude oil, gasoline and fuel oil inventories. These inventory data are usually released before the U.S. Energy Information Administration (EIA) releases its weekly report on oil inventories. Due to the earlier release of API crude oil inventory change data, it has become the focus of market attention.

When the API crude oil inventory change data is released, if the crude oil inventory decreases, it indicates that the supply decreases and the demand increases, which may lead to an increase in crude oil prices; on the contrary, if the crude oil inventory increases, it indicates that the supply increases and the demand decreases, which may lead to a decline in crude oil prices . Therefore, API crude oil inventory change data is very important for the impact of the oil market.

In addition to affecting supply and demand and prices in the oil market, API crude oil inventory change data can also reflect changes in the US economy and energy policies. When API crude oil inventories decrease, it may indicate that the US economy is growing and energy demand is increasing, and vice versa may indicate economic contraction or energy policy adjustments.

In short, the change of API crude oil inventory is an important indicator in the oil market, which can reflect the supply and demand situation of the US oil market and the level of crude oil inventory. Investors, analysts, and policymakers all need to pay close attention to changes in API crude oil inventory change data in order to adjust their investment and policy decisions in a timely manner. "