I bought 10 shares of $Apple (AAPL.US)$ at $150 each, it fell to $120, causing me a 20% loss. I then bought 20 more shares at $120 each. The average cost of my shares became $130 each equating to an 8% loss which was a lot easier to recover and it was done in the first day of the price rebounce and by the time it got to my original purchase price of $150 a couple of days later, I was already up by $20 a share, giving me a healthy 15% return on m...