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发表于 2021-1-5 01:38 PM
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deep 发表于 2021-1-5 11:51 AM
理科生你数学好的帮算一个结果出来看看
大约算了, from 2007/1 , monthly $500 buy at the 1st of the month, total investments $87000, double down 5 times when market drop 20% or more
Total value as of today : $ 235258 not including dividend or selling covered call
606 股 as of today
Date Adj Close stocks ($500/B2) profit 20% drop/double down
1/1/2007 108.270851 4.618048121 1703.090008 0
2/1/2007 106.146843 4.710455684 1737.168994 0
3/1/2007 106.952736 4.674962219 1724.079359 0
4/1/2007 112.133286 4.45897929 1644.427013 0
5/1/2007 115.936897 4.312690894 1590.477314 0
6/1/2007 113.751495 4.395546626 1621.03368 0
7/1/2007 110.664864 4.518145886 1666.247062 0
8/1/2007 112.084999 4.460900249 1645.135443 0
9/1/2007 115.874573 4.315010507 1591.332764 0
10/1/2007 118.003746 4.237153624 1562.619923 0
11/1/2007 113.433182 4.407881285 1625.582579 0
12/1/2007 111.563744 4.481742743 1652.821946 0
1/1/2008 105.374779 4.744968433 1749.896951 0
2/1/2008 102.651634 4.870843069 1796.318259 0
3/1/2008 101.232506 4.939124988 1821.499949 0
4/1/2008 106.582542 4.691199803 1730.067617 0
5/1/2008 108.19371 4.621340742 1704.304294 0
6/1/2008 98.657852 5.068020334 1869.035264 0
7/1/2008 98.260384 5.088520721 1876.595602 0
8/1/2008 99.77887 5.011081003 1848.036608 0
9/1/2008 89.862183 5.564075825 2051.975574 5.564075825 2051.975574
10/1/2008 75.452362 6.626697783 2443.859935 6.626697783 2443.859935
11/1/2008 70.200401 7.122466437 2626.694461 7.122466437 2626.694461
12/1/2008 70.317284 7.11062731 2622.32831 7.11062731 2622.32831
1/1/2009 65.067177 7.684365959 2833.917391 0
2/1/2009 58.075756 8.609444533 3175.077127 0
3/1/2009 62.46698 8.004228794 2951.879609 0
4/1/2009 69.164375 7.229155183 2666.040205 0
5/1/2009 73.207291 6.829920807 2518.806556 0
6/1/2009 72.748375 6.873005754 2534.695854 0
7/1/2009 78.617424 6.359913294 2345.472481 0
8/1/2009 81.521523 6.133349594 2261.918052 0
9/1/2009 84.011887 5.951538739 2194.868025 0
10/1/2009 82.7892 6.039435095 2227.283323 0
11/1/2009 87.889572 5.688957047 2098.030521 0
12/1/2009 89.088737 5.612381731 2069.790309 0
1/1/2010 86.313232 5.792854565 2136.346887 0
2/1/2010 89.005737 5.617615413 2071.720439 0
3/1/2010 94.037148 5.317047684 1960.874063 0
4/1/2010 95.885147 5.214571971 1923.082044 0
5/1/2010 88.266632 5.664654793 2089.068092 0
6/1/2010 83.303314 6.002162171 2213.537441 0
7/1/2010 89.416374 5.591816998 2062.206241 0
8/1/2010 85.394386 5.855185843 2159.33404 0
9/1/2010 92.546371 5.40269699 1992.460671 0
10/1/2010 96.596222 5.176185876 1908.925636 0
11/1/2010 96.596222 5.176185876 1908.925636 0
12/1/2010 102.514778 4.877345586 1798.716323 0
1/1/2011 105.455078 4.741355367 1748.564488 0
2/1/2011 109.118317 4.58218211 1689.862981 0
3/1/2011 108.659386 4.601535297 1697.000243 0
4/1/2011 112.292023 4.452676037 1642.102436 0
5/1/2011 111.032715 4.503177284 1660.726791 0
6/1/2011 108.621101 4.603157171 1697.598375 0
7/1/2011 106.975945 4.673947961 1723.705311 0
8/1/2011 101.094864 4.945849672 1823.979945 0
9/1/2011 93.59256 5.342304987 1970.188704 5.342304987 1970.188704
10/1/2011 104.345009 4.791796031 1767.166501 0
11/1/2011 103.920952 4.811349303 1774.377553 0
12/1/2011 104.345009 4.791796031 1767.166501 0
1/1/2012 109.876419 4.550566942 1678.203623 0
2/1/2012 114.645638 4.361264927 1608.390932 0
3/1/2012 117.816757 4.243878483 1565.099984 0
4/1/2012 117.543144 4.253757242 1568.743171 0
5/1/2012 110.483986 4.525542733 1668.974945 0
6/1/2012 114.374931 4.371587337 1612.197733 0
7/1/2012 116.327545 4.298208133 1585.136216 0
8/1/2012 119.241821 4.193159714 1546.395409 0
9/1/2012 121.615562 4.111315951 1516.212247 0
10/1/2012 120.039742 4.165287193 1536.116301 0
11/1/2012 120.719131 4.141845587 1527.471271 0
12/1/2012 120.939957 4.134282932 1524.68224 0
1/1/2013 128.032547 3.905256997 1440.219763 0
2/1/2013 129.666061 3.856059143 1422.076086 0
3/1/2013 133.993729 3.731517913 1376.146525 0
4/1/2013 137.175446 3.64496719 1344.227483 0
5/1/2013 140.414139 3.560894961 1313.222485 0
6/1/2013 137.811188 3.628152455 1338.026376 0
7/1/2013 145.699768 3.431714455 1265.582005 0
8/1/2013 141.329849 3.537823068 1304.713801 0
9/1/2013 145.0952 3.446013376 1270.855304 0
10/1/2013 152.554092 3.277525981 1208.718836 0
11/1/2013 157.075409 3.183184454 1173.926623 0
12/1/2013 160.277664 3.11958627 1150.472249 0
1/1/2014 155.467651 3.216103136 1186.066705 0
2/1/2014 162.543869 3.076092645 1134.432234 0
3/1/2014 163.172119 3.064248985 1130.064411 0
4/1/2014 165.03157 3.029723343 1117.331699 0
5/1/2014 168.861328 2.961009521 1091.990728 0
6/1/2014 171.525604 2.915016699 1075.029035 0
7/1/2014 170.031525 2.940631156 1084.475391 0
8/1/2014 176.741592 2.828988889 1043.302838 0
9/1/2014 173.492249 2.881973131 1062.842897 0
10/1/2014 178.408218 2.802561483 1033.556675 0
11/1/2014 183.309448 2.727628093 1005.921989 0
12/1/2014 181.840836 2.749657398 1014.046177 0
1/1/2015 177.426895 2.818062053 1039.27313 0
2/1/2015 187.399124 2.66810212 983.9694048 0
3/1/2015 183.636185 2.722774926 1004.132189 0
4/1/2015 186.269806 2.68427831 989.935022 0
5/1/2015 188.66452 2.650206833 977.3698017 0
6/1/2015 183.937607 2.718313064 1002.486699 0
7/1/2015 189.007553 2.645396928 975.5959567 0
8/1/2015 178.825409 2.796023243 1031.145437 0
9/1/2015 172.06424 2.905891428 1071.663726 0
10/1/2015 188.537033 2.651998878 978.0306901 0
11/1/2015 188.356552 2.654539992 978.9678275 0
12/1/2015 184.00618 2.717300039 1002.113106 0
1/1/2016 175.885727 2.84275483 1048.379579 0
2/1/2016 175.740417 2.845105346 1049.246426 0
3/1/2016 186.59938 2.679537306 988.1865872 0
4/1/2016 188.300995 2.655323197 979.2566656 0
5/1/2016 191.504318 2.610907186 962.8764846 0
6/1/2016 191.175751 2.61539446 964.5313463 0
7/1/2016 199.178619 2.510309603 925.7771011 0
8/1/2016 199.41716 2.507306793 924.6696949 0
9/1/2016 198.426392 2.519826092 929.2866873 0
10/1/2016 195.971222 2.551395021 940.9289926 0
11/1/2016 203.190506 2.460744893 907.4981313 0
12/1/2016 206.094772 2.426068333 894.7097625 0
1/1/2017 211.019257 2.369451997 873.8302235 0
2/1/2017 219.310547 2.279872112 840.7940567 0
3/1/2017 218.633499 2.286932251 843.3977654 0
4/1/2017 221.764282 2.254646219 831.4909995 0
5/1/2017 224.894043 2.223269204 819.9194698 0
6/1/2017 225.22937 2.219959147 818.6987536 0
7/1/2017 230.979706 2.164692339 798.3169071 0
8/1/2017 231.653641 2.158394739 795.9944152 0
9/1/2017 235.154327 2.126263235 784.1446375 0
10/1/2017 241.889999 2.067055282 762.3093359 0
11/1/2017 249.2836 2.005747671 739.6997015 0
12/1/2017 251.023804 1.991842973 734.5717879 0
1/1/2018 266.526703 1.875984636 691.8443909 0
2/1/2018 256.835663 1.946770141 717.949378 0
3/1/2018 248.799225 2.009652562 741.1397865 0
4/1/2018 251.08667 1.991344264 734.3878689 0
5/1/2018 257.190338 1.944085473 716.9592992 0
6/1/2018 257.513123 1.94164862 716.0606122 0
7/1/2018 268.252197 1.863917633 687.3942005 0
8/1/2018 276.814819 1.80626168 666.1312612 0
9/1/2018 277.20575 1.803714389 665.1918458 0
10/1/2018 259.217804 1.928879854 711.3516188 0
11/1/2018 264.026093 1.893752221 698.3968986 0
12/1/2018 239.381088 2.088719724 770.2989657 0
1/1/2019 260.057129 1.922654464 709.0557571 0
2/1/2019 268.48703 1.862287351 686.7929691 0
3/1/2019 272.148102 1.837234933 677.5538876 0
4/1/2019 284.513733 1.757384414 648.1058139 0
5/1/2019 266.369965 1.877088507 692.2514875 0
6/1/2019 283.526703 1.763502325 650.3620384 0
7/1/2019 289.213287 1.728827901 637.5744573 0
8/1/2019 284.37088 1.758267232 648.4313883 0
9/1/2019 288.571533 1.73267264 638.9923586 0
10/1/2019 296.312378 1.687408415 622.2993644 0
11/1/2019 307.038361 1.628461012 600.5601512 0
12/1/2019 314.413696 1.590261513 586.4725578 0
1/1/2020 315.831909 1.583120596 583.8390588 0
2/1/2020 290.828827 1.719224346 634.0327622 0
3/1/2020 253.024826 1.976090678 728.762499 0
4/1/2020 286.831604 1.743183084 642.8685052 0
5/1/2020 300.497772 1.663905848 613.6318525 0
6/1/2020 304.487 1.642106231 605.5923718 0
7/1/2020 323.837738 1.543983117 569.4055475 0
8/1/2020 346.440552 1.443249057 532.2558327 0
9/1/2020 332.139008 1.50539379 555.1741893 0
10/1/2020 325.153992 1.537732927 567.1005402 0
11/1/2020 360.523224 1.386873207 511.4649826 0
12/1/2020 372.29306 1.34302799 495.2953045 0
1/1/2021 368.790009 1.355785102 500 0
223543.0984 11715.04698
total value 235258
cost 169*500+500*5= 87000
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