1. The total amount the stock increased over the first 10 days was $3.
2. The total amount the stock decreased over the next 10 days was $4.50.
3. The total amount the stock increased over the last 10 days was $2.50.
4. The total amount that the stock changed over 30 days was a $1.00 increase ($3 - $4.50 + $2.5).
5. I would buy the stock based on the criteria of an overall increase over the 30-day period since it actually increased by $1.00.
Increase in the first 10 days = $0.30 per day
Total increase in the first 10 days = $3 ($0.30 x 10)
Decrease in the second 10 days = $0.45 per day
The total decrease in the second 1-0 days = $4.50 ($0.45 x 10)
Increase in the last 10 days = $0.25 per day
The total increase in the last 10 days = $2.50 ($0.25 x 10)
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