%% Task 2.1
IBM=0.0125
MSFT=0.0107
HPQ=0.0151

%% Task 2.2
IBM=0.0125;
MSFT=0.0107;
HPQ=0.0151;

%% Task 2.3
Aug01=[ 0.0125 0.0107 0.0151];
Aug02=[ 0.0105 0.0075 0.0316];
Aug03=[ -0.0119 -0.0192 -0.0172];
Aug06=[ 0.0177 0.0199 0.0219];
Aug07=[ -0.0032 0.0003 0.0004];
Aug08=[ -0.0013 0.0152 0.0188];
Aug09=[ -0.0201 -0.0237 -0.0495];
Aug10=[ 0.0171 -0.0204 0.0040];
Aug13=[ 0.0006 -0.0028 0.0256];
Aug14=[ -0.0059 -0.0092 -0.0241];
Aug15=[ -0.0073 -0.0060 -0.0242];
Aug16=[ -0.0139 -0.0104 -0.0022];
Aug17=[ 0.0110 0.0157 0.0236];
Aug20=[ -0.0153 0.0004 -0.0122];
Aug21=[ -0.0016 -0.0067 -0.0123];
Aug22=[ 0.0088 0.0053 0.0089];
Aug23=[ 0.0131 0.0028 0.0262];
Aug24=[ 0.0159 0.0179 0.0094];
Aug27=[ 0.0018 -0.0112 -0.0065];
Aug28=[ -0.0128 -0.0199 -0.0193];
Aug29=[ 0.0227 0.0234 0.0324];
Aug30=[ 0.0070 -0.0049 0.0004];
Aug31=[ 0.0114 0.0098 0.0186];

%% Task 2.4
IBM=[0.0125;0.0105;-0.0119;0.0177;-0.0032;-0.0013;-0.0201;0.0171;0.0006;-0.0059;-0.0073;-0.0139;0.0110;-0.0153;-0.0016;0.0088;0.0131;0.0159;0.0018;-0.0128;0.0227;0.0070;0.0114];
MSFT=[0.0107;0.0075;-0.0192;0.0199;0.0003;0.0152;-0.0237;-0.0204;-0.0028;-0.0092;-0.0060;-0.0104;0.0157;0.0004;-0.0067;0.0053;0.0028;0.0179;-0.0112;-0.0199;0.0234;-0.0049;0.0098];
HPQ=[0.0151;0.0316;-0.0172;0.0219;0.0004;0.0188;-0.0495;0.0040;0.0256;-0.0241;-0.0242;-0.0022;0.0236;-0.0122;-0.0123;0.0089;0.0262;0.0094;-0.0065;-0.0193;0.0324;0.0004;0.0186];

%% Task 2.5
returns= [    0.0125    0.0107    0.0151;
    0.0105    0.0075    0.0316;
   -0.0119   -0.0192   -0.0172;
    0.0177    0.0199    0.0219;
   -0.0032    0.0003    0.0004;
   -0.0013    0.0152    0.0188;
   -0.0201   -0.0237   -0.0495;
    0.0171   -0.0204    0.0040;
    0.0006   -0.0028    0.0256;
   -0.0059   -0.0092   -0.0241;
   -0.0073   -0.0060   -0.0242;
   -0.0139   -0.0104   -0.0022;
    0.0110    0.0157    0.0236;
   -0.0153    0.0004   -0.0122;
   -0.0016   -0.0067   -0.0123;
    0.0088    0.0053    0.0089;
    0.0131    0.0028    0.0262;
    0.0159    0.0179    0.0094;
    0.0018   -0.0112   -0.0065;
   -0.0128   -0.0199   -0.0193;
    0.0227    0.0234    0.0324;
    0.0070   -0.0049    0.0004;
    0.0114    0.0098    0.0186];

%% Task 2.6
returns_row=[Aug01;Aug02;Aug03;Aug06;Aug07;Aug08;Aug09;Aug10;Aug13;Aug14;Aug15;Aug16;Aug17;Aug20;Aug21;Aug22;Aug23;Aug24;Aug27;Aug28;Aug29;Aug30;Aug31];
returns_col=[IBM MSFT HPQ];
returns_row-returns
returns_col-returns

%% Task 2.7
save myfirstmat
save returnsonly returns

clear all
whos

load returnsonly
whos
load myfirstmat
whos

%% Task 2.8
IBM+MSFT+HPQ
% The following command doesn't actually work, and is included to 
% understand conformability of matrices
% IBM+Aug01

%% Task 2.9
IBM*2

%% Task 2.10
w=[1/3 1/3 1/3];
portreturns=returns*w'

%% Task 2.11
IBMmean = mean(IBM)
retmean=mean(returns)

%% Task 2.12
retsum=sum(returns)
retsum/length(returns)
mean(returns)

%% Task 2.12.1
std(returns)

%% Task 2.12.2
corr(returns)

%% Task 2.13
max(returns)
min(returns)

%% Task 2.14
round(100*returns)
floor(100*returns)
ceil(100*returns)

%% Task 2.15 
IBM.*MSFT