What 1973 event helped trigger the severe global stock-market decline that followed?

The 1973 oil crisis helped trigger the severe global stock-market decline that followed.

In October 1973, Arab members of the Organization of Petroleum Exporting Countries and some allied producers imposed an oil embargo or reduced exports to countries viewed as supporting Israel during the Yom Kippur War. Oil prices rose sharply, creating a major shock for energy-importing economies.

Higher energy costs contributed to inflation, weaker economic growth, and pressure on corporate profits. These conditions helped produce the long bear market of 1973–1974, when major stock indexes in the United States and other countries fell substantially.

The oil crisis was an important trigger, not the only cause. Tight monetary policy, inflation that had already been building, recession risks, and political uncertainty also affected markets. The 1973–1974 decline is therefore better understood as a broad economic and financial crisis than as a one-cause event.