[問題] 小弟想用統計學來算股票可行嗎^^?
怎麼算每日股價報酬率後，計算平均每日報酬率與風險值。
我知道報酬率（Rt）=（Pt－Pt-1）/ Pt-1
友訊 當日收盤
2008/1/2 55.5
2008/1/3 52.8
2008/1/4 51.5
2008/1/7 47.9
2008/1/8 46.8
2008/1/9 47.3
2008/1/10 48
2008/1/11 50.1
2008/1/14 48
2008/1/15 49.7
2008/1/16 46.25
2008/1/17 44.5
2008/1/18 46.05
2008/1/21 45
2008/1/22 41.85
2008/1/23 38.95
2008/1/24 38.4
2008/1/25 39.65
2008/2/14 46
2008/2/15 47
2008/2/18 46.5
2008/2/19 45.6
2008/2/20 43
2008/2/21 44.2
2008/2/22 47.25
2008/2/25 46.6
2008/2/26 46.35
2008/2/27 47.85
2008/2/29 49.5
2008/3/3 47.9
2008/3/4 48
2008/3/5 47.95
2008/3/6 49.2
2008/3/7 47.8
2008/3/10 46.5
2008/3/11 46.25
2008/3/12 47.15
2008/3/13 47.7
2008/3/14 47.25
2008/3/17 45.35
2008/3/18 44.55
2008/3/19 44.6
2008/3/20 45.9
2008/3/21 48.1
2008/3/24 50.8
2008/3/25 49.6
2008/3/26 47.45
2008/3/27 46.5
2008/3/28 49
2008/3/31 50.1
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推
05/02 00:25, , 1F
05/02 00:25, 1F
推
05/02 10:42, , 2F
05/02 10:42, 2F
→
05/02 10:43, , 3F
05/02 10:43, 3F
→
05/02 11:17, , 4F
05/02 11:17, 4F
→
05/02 11:35, , 5F
05/02 11:35, 5F
推
05/02 11:38, , 6F
05/02 11:38, 6F
→
05/02 11:39, , 7F
05/02 11:39, 7F
→
05/02 11:40, , 8F
05/02 11:40, 8F
推
05/02 11:58, , 9F
05/02 11:58, 9F
推
05/02 17:17, , 10F
05/02 17:17, 10F
→
05/02 17:17, , 11F
05/02 17:17, 11F
推
05/02 22:56, , 12F
05/02 22:56, 12F
推
05/03 00:13, , 13F
05/03 00:13, 13F
→
05/03 11:57, , 14F
05/03 11:57, 14F
推
05/03 13:05, , 15F
05/03 13:05, 15F
推
05/03 14:37, , 16F
05/03 14:37, 16F
推
05/03 14:38, , 17F
05/03 14:38, 17F
推
05/03 17:02, , 18F
05/03 17:02, 18F
→
05/03 17:03, , 19F
05/03 17:03, 19F