CFALA
Review:
Tips
for
using
the
TI
calculator
2/9/2015
By
David
Cary
13
CFA Society Los Angeles
25
If asked for the Mean
Absolute Deviation: No
shortcut!
Year
S&P
|S&P
‐
Mean|
2007
13.50%
8.60%
2008
‐
1.20%
6.10%
2009
‐
35.60%
40.50%
2010
32.40%
27.50%
2011
16.50%
11.60%
2012
3.80%
1.10%
sum
29.40%
95.4%
Mean
4.90%
median
8.65%
MAD
15.90%
Mean = r = 4.90%
StDev = s = 22.99%
3. Coefficient of Variation =
s / r
CV = 22.99%
/
4.90%
= 4.69
4. Sharpe =
(r
r
f
) / s
= (4.90%
3.0%)
/
22.99%
= 0.083
6
Geometric
and
Harmonic
Mean
Using
the
Statistics
Function
for
the
calculation
is
after
this
slide.
•
Data:
3,
3,
4,
6,
22
Geometric
Mean
(ALG)
KEYS
DISPLAY
3
[
]
3.0000
3
[
]
9.0000
4
[
]
36.0000
6
[
]
216.000
22
[
=
]
4,752.0000
[y
x
] 5
[1/x]
[=]
5.4372
Harmonic
Mean
(ALG)
KEYS
DISPLAY
3
[1/x]
[+]
0.3333
3
[1/x]
[
+
]
0.6667
4
[1/x]
[
+
]
0.9167
6
[1/x]
[
+
]
1.0833
22
[1/x]
[
=
]
1.1288
[
]
5
[=]
0.2258
[1/x]
4.4295
From
D.Cary’s notes,
SS
2,
slides
81
&
84.
CFA Society Los Angeles
26
