Quote from Pa(b)st Prime:
WW's l and ll, Korea, Vietnam and both Gulf Wars all produced MASSIVE index liftoffs. In fact to this DAY the market has never traded below it's reaction levels to each of the aforementioned wars except for the 1932 lows which took out the war bride boom lows of 1915.
This simply isn't true. Just look at the Dow Jones performance during each of these conflicts:
WWI - the market sold off heavily on the outbreak of the war. There was then a rebound as the US stayed out of the fray, but after US entry into the war in 1917, stocks fell again and ended lower at the end of 1917 than they were in 1914 before hostilities. By the end of WWI stocks were below their 1910 levels.
WWII - the Dow collapsed after the 1940 defeat of France, and went down even further after Pearl Harbour, experiencing 3 consecutive down years in a grinding bear market. The market only turned up after Guadalcanal and Midway, which stopped an invasion of Australia and destroyed the Japanese carrier fleet, and the market only got above the pre-war high after D-Day, when it became obvious that the Allies would win easily. Stocks were effectively flat during WWII, with a significant dip at the worst point, down over 25% from the pre-war level.
In Korea stocks sold off sharly as soon as the invasion started - stocks fell for the next month and were lower until the Inchon victory, at which point it became clear N Korea would never win the war. If war was good for stocks, the invasion would have pushed stocks up and Inchon would have caused a selloff.
From the start to the end of the Vietnam war, stocks performed horribly in real terms. Even in nominal terms, the Dow was lower in 1975 when the war ended than it was in the mid 1960s when the war began. In real terms the performance was even worse.
In Gulf War I, stocks sold off on the invasion news. They only made new highs once the war was already over.
Gulf War II, stocks sold off once it was clear conflict was unavoidable - another bearish reaction. Stocks rallied on invasion only because once again it was going to be a clear cakewalk, so you had a typical 'sell the rumour, buy the fact' rally off an over-discounted news event. The rally in the rest of 2003 was the result of their having been a killer bear market in the 3 prior years which had depressed stock prices and sentiment, nothing to do with what happened in Iraq.
The only war which produced a meaningful rise in prices was Korea, and that only after defeat was clearly staved off, and a stalemate entered into. Even then, stock prices rose much more immediately after the war than during it.
Conclusion - wars are not good for stocks.