Golden rules for losing money

In the first of two articles, here we explain the classic investment mistakes that, to be successful, you should avoid at all costs.

Investing successfully poses many challenges. In these pages we aim to show you some of the techniques that can help you to rise to these challenges but first, one of our favourite tools, from mathematician Carl Jacobi.

He was fond of saying, 'invert, always invert' and that's what we're going to do, here and in our next issue. Instead of looking at how to make money, we're going to look at great ways to lose it. That way you can aim to minimise your mistakes-a vital part of investing successfully.

So here they are, classic investment mistakes guaranteed to ensure woeful performance.

1. Trade fast and trade often

Charlie Munger, Warren Buffett's business partner, often refers to the huge mathematical advantages of 'doing nothing' to your portfolio. Let's blindly ignore the very large tax benefits of holding stocks for the long term and just consider the impact of brokerage.

Someone who 'turns over' (buys and sells) all the stocks in their portfolio several times a year is at least a few percent behind the eight ball, even with internet brokerage rates as low as 0.3%. Add up the brokerage from your last tax return to see what we mean.

There's also an important, but less measurable, benefit to taking a longer-term approach. It makes you think long and hard about which stocks to include in your portfolio. When you are considering buying a stock for 10 years or more, you tend to pick quality businesses. And that can only be a good thing.

So, if your intention is to lose money (and enrich your broker), trade fast and frequently.

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