By Mmaxer @ Shutterstock.com

In the Spring of 1996, I explained how important just ten days of a 31-year period were to building 37% of their wealth. I wrote that March:

Market Timing Strategyโ€”Bankrupt

Before I tell you what other funds I have bought this month and which funds I have on my short list for the next few months, I want to startle you, shock you, and convince you beyond any doubt that market timing is a bankrupt strategy whose time has never come.

Hereโ€™s the only example youโ€™ll ever need to never market time again. T. Rowe Price put these numbers out a year or so ago. The original research was done by Towneley Capital Management.

If you invested $1 for a 31-year period (1963-1993), your $1 grew to $24.30 at year-end 1993. But if you missed just the 10 best trading days out of the 7,802 trading days, your $1 investment grew to only $15.40. Thatโ€™s right, by missing just 10 days, your return was slashed by 37%. Do you know what percentage of the trading days we are talking about here? Less than one-quarter of one percent (0.128%).

Now then, if instead of only 10 days you missed the best 40 days of 7,802 trading days, your $1 grew to only $6.50. By missing just 0.51% of the total trading period, your return was slashed by an unimaginable 73%. Howโ€™s that for missing the boat?

OK, what if you missed out on just 1.15% of the trading days? Well, by missing just 90 of the total 7,802 trading days, your $1 made a glacier-like advance to $2.10. You would have been head-faked out of 91.4% of your long-term profits.

Still with me? The news gets worseโ€”a lot worse. In-and-out trading necessitates not one, but two correct buy/sell decisions. It does no good to get out of the market advantageously unless you can also get back in advantageouslyโ€”and both are low odds, big โ€œifs.โ€ Furthermore, there is a substantial transaction penalty to pay on each and every buy and sell. You find commissions extracted from your hide. And you do not see the bid/ask spread that is also lost on each transaction.

Finally, in all non-tax-deferred accounts, a tax penalty will be extracted. And depending on your location, the onerous nature of state and local taxes along with federal taxes may be a back snapper.

Market timing is akin to trying to draw an inside straight in poker or to yank the mask off the Lone Ranger. Not good ideasโ€”not good ideas at all.

You wonโ€™t be able to pick which days you earn your 37%, but if you remain invested with a balanced portfolio and a strong investment plan created with your advisor, you wonโ€™t need to. The market will do the work for you.

Originally posted on Young’s World Money Forecast.ย