The 1990 oil price shock occurred in response to the Iraqi invasion of Kuwait on August 2, 1990, Saddam Hussein's second invasion of a fellow OPEC member. Lasting only nine months, the price spike was less extreme and of shorter duration than the previous oil crises of 1973–1974 and 1979–1980, but the spike still contributed to the early 1990s recession in the United States.
The average monthly price of oil rose from $17 per barrel in July to $36 per barrel in October. As the U.S.-led coalition experienced military success against Iraqi forces, concerns about long-term supply shortages eased and prices began to fall.
Iraqi invasion of Kuwait and ensuing economic effects
thumb|One of the hundreds of [[Kuwaiti oil fires set by retreating Iraqi forces in 1991]]
On August 2, 1990, the Republic of Iraq invaded the State of Kuwait, leading to a seven-month occupation of Kuwait and an eventual U.S.-led military intervention. While Iraq officially claimed Kuwait was stealing its oil via slant drilling, its true motives were more complicated and less clear. At the time of the invasion, Iraq owed Kuwait $14 billion of outstanding debt that Kuwait had loaned it during the 1980–1988 Iran–Iraq War. In addition, Iraq felt Kuwait was overproducing oil, lowering prices and hurting Iraqi oil profits in a time of financial stress.
In the buildup to the invasion, Iraq and Kuwait had been producing a combined of oil a day. The potential loss of these supplies, coupled with threats to Saudi Arabian oil production, led to a rise in prices from $21 per barrel at the end of July to $28 per barrel on August 6. On the heels of the invasion, prices rose to a peak of $46 per barrel in mid-October.