Which component is NOT part of the four sectors of GDP?

The correct understanding of the components of GDP reveals that the four primary sectors include household consumption, government spending, investment, and net exports. The trade sector, while relevant in economic discussions, is not formally classified as one of these four components.

Household consumption tracks the total spending by consumers on goods and services. Government spending analyzes expenditures on public services and infrastructure. Net exports, which represent the difference between a country's exports and imports, directly affect the overall GDP calculation.

The term "trade sector" is a broader concept that encompasses various activities related to trade but does not specifically identify one of the four fundamental components used in GDP calculations. Therefore, it does not fit into the official structure, making it the correct choice as the component that is NOT part of the four sectors of GDP.