If you spot a good share, don't buy it

What prompts you to think of buying a new stock? It's probably a piece of news or fresh information in some form, whether about a company you already know or a name that's unfamiliar. Then you do some research -- more if it's a new name, less if you already know it, and then... my advice is: don't buy it!

Instead, watch and weight. First, put the share on a watch list, to give yourself some time before you actually purchase the shares. And then build your new position over time, weighting how much of your portfolio is invested in the share depending on its price and the level of your conviction in the share.