I sold out of Tesco in October at 407, having bought them at 321 exactly a year previously and enjoyed two dividends in addition to the 26% rise in share value. It was my first investment. Of course, commissions took their toll from my profit: although I try to keep these as low as possible, I’m playing with hundreds rather than thousands, so it’s hard not to lose a few points to the brokers. However, perhaps that’s a good thing as it discourages frequent trading, a sure fire way of making brokers rich at your expense. The asymmetric brokerage costs that I now have arranged (£1.50 flat to buy, £10 flat to sell) are a good incentive to stay in the game too. Despite this, not staying in the game is my first investment mistake. Tesco passed 420 today, making 321 seem even more of a steal.