API Weekly Statistical Bulletin
a.k.a. API inventories, WSB
A weekly report of US crude oil and fuel stockpiles from the American Petroleum Institute, released the day before the government's figures.
The API Weekly Statistical Bulletin is an industry survey of how much crude oil, gasoline and other fuels are sitting in US storage. It usually lands on Tuesday afternoon, US time.
A surprise build in stockpiles hints that demand is weak (bad for oil prices); a surprise draw hints the opposite. Traders use it as a preview of the official EIA crude inventories report the next day, which carries more weight. Oil swings ripple into currencies like the Canadian dollar.
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