Excerpts from a nice article that appeared on rediff.com
1. Put all your eggs in one basket and watch that basket!
This saying comes from Mark Twain, but has been applied to stock market investment more or less verbatim by both John Maynard Keynes and Warren Buffett. Modern portfolio theory suggests that one can reduce risk by diversification.
However, if you were an active investor you would do better to concentrate your shareholdings in a limited number of companies which you feel you understand. This can actually reduce risk.
2. When the ducks quack, feed them
This is an old Wall Street adage relating to initial public offerings. Investment bankers are out to make money and will sell the public anything within the bounds of the law.
Research suggests that, in general, IPOs rocket upwards on the first day’s trading but tend to under perform comparable companies over a three-year period. Since small investors don’t receive fair allocations of the best IPOs but are landed with the duds, they should avoid the new issue market entirely.
3. Markets make opinions, not the other way round
When markets rise, commentators find a way of rationalising the gains. Take the tech bull market. We were told that the ‘valuation clocks’ were broken and that companies deserved to trade on a higher price-earnings ratio.
We were also told that US productivity had risen and that the US would experience a higher growth rate in the past. We were also told that Greenspan et al would prevent another cyclical downturn. All these comments were spurious rationalisations of an ‘irrationally exuberant’ market.
4. Buy low, sell high
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