S&P500 Average Monthly Change

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By Barry Ritholtz - April 21st, 2010, 12:10PM

As April starts heading into May, its time to start looking at the Seasonal — sell in May, then go away – Trade.

Here are the numbers dating back to 1928:
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S&P500 Monthly Percentage Change


via the Chart Store

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Its not October (as many people fear), it is September that’s a bitch . . .

Comments

Please use the comments to demonstrate your own ignorance, unfamiliarity with empirical data, ability to repeat discredited memes, and lack of respect for scientific knowledge. Also, be sure to create straw men and argue against things I have neither said nor even implied. Any irrelevancies you can mention will also be appreciated. Lastly, kindly forgo all civility in your discourse . . . you are, after all, anonymous.

9 Responses to “S&P500 Average Monthly Change”

  1. How the Common Man Sees It Says:

    For gold fans, the sell in May theme also is pretty consistent. More accurately, it tends to peak in April, bottom in May and flounder around in a channel until about July when it usually hits its yearly low (that or August is usually the best time to buy from a seasonal perspective leading into the traditional October rally). So don’t be surprised if we get a pullback here and the MSM triumphantly places its foot on gold’s neck and declares it, once again, dead forever

  2. bsneath Says:

    Trying to come up with a catchy phrase. Best i can come up with is: “Sell in May, then go away but remember September, cause that’s a bitch…”

  3. bondjel Says:

    You often ask about what your readers think of the market and I have to say that I’m now seeing indications that we could be making a short to medium term top. This is based on price and volume in several stocks I watch very closely, price and volume in the S&P 500, an indicator I watch carefully, and the time of year (sell in May & go away).

  4. constantnormal Says:

    With program trades apparently comprising a much larger fraction of market volume these days (readers with data to substantiate /falsify that view are invited to do so), might the “sell in May…” pattern be diminished? So far as I know, there are no vacations for computers … this of course makes the tacit assumption that the reason behind the “sell in May …” pattern is the expensive summer vacations that Wall Streeters take, returning in the fall with a pressing need to generate some cash to pay the bills …

    I can easily imagine that pumping C up and down in an automated manner could be accomplished without a lot of human supervision …

  5. constantnormal Says:

    It would be interesting to see that bar chart with the bars normalized by their contribution to the annual share trading volume (e.g., multiple each month’s bar by the ratio of the shares traded that month to the annual shares traded for that year). My guess is that the bump up in the summer months might be considerably diminished.

    Looking at price changes without considering volume is unlikely to be very illuminating.

  6. forcast Says:

    Merci Barry
    voici d’autres graphiques :
    http://weinstein-forcastinvest.net/investissement-les-periodes-propices-aux-achats-d%e2%80%99actions/

  7. cognos Says:

    eh, who cares about -1% in this bull market!

  8. JSG Says:

    It may be interesting to see which months have the highest standar deviation of returns, better than the average return. ??

  9. Hot Links: Flying Sniper Robots The Reformed Broker Says:

    [...] Chart: 80 years of 'Sell in May, Go Away' stats.  Good to know.  (TBP) [...]

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