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Correlation between NASDAQ price, Corn and Gold(Corr=0.945)

 I wrote Python code which shows Correlation between NASDAQ price, Corn and Gold(Corr=0.945). Corn and Gold are best mix I have found. https://gist.github.com/Kouhei-Takagi/a1a9b073f6cd6dacb7eb1ea871d8fd3c I changed some important parts. https://gist.github.com/Kouhei-Takagi/5becaf7c3a24d63ac9c56856e81297f2
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Education loan

2017/5/6. Saving money is one important skill... Difficult skill...

I already returned the education loan. It took 4 years returning about $20000 as education loan.
It was not easy for me returning it. 
I think that education loan is investment.
If we want to education, there are a lot of way. But if we want college education, it needs cost. This is investment.
If we can get benefits from college education, it's good investment. But if the college education is failed, it's bad investment.
It seems high risk.
I think that some politicians don't want to do effort for education, but it's wrong.
Education needs labor, time & cost, because it is investment. 
College education becomes bad investment in Japan, because bad quality education is spreading. Bad money drives out the good coins. 

In addition, recently teachers teaches investment skills in school. But I think saving money skill is more important than investment skill. 

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