How do I calculate annual percentage of stock appreciation over given time (months).
You divide current price by the purchase price, then subtract 1 and multiply by 100. Example:
Purchase price=$15. Current price =$20. So you have: 20/15=1.3333 - 1 x 100 =33.33%. This is the return over the number of months you had the stock. Let us say you had for 7 months, then the annual SIMPLE return would be: 33.33 / 7 x 12 =57.14% annual simple return on your stock. If you wanted a COMPOUND return, then it gets more involved!.