data

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Do stocks only go up?

We took the data set from the SP500 Yahoo Finance Historical Data and tested it.

We only had open and close data from 1982 and after. 

Methodology: Rather than measuring calender years, we measured trading years on a daily basis. Every day of every year we looked back 1 trading year and measured the results.

Results:

Over 9930 Periods, 7727 of periods the SP500 was higher than the same day in the previous trading year. It was never the exact same. 1950 it was lower.

Mean returns were 10.6%

Median returns were 11.96%

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Data science isn’t just for data scientists anymore
  • Relegating all data knowledge to a handful of people within a company is problematic on many levels. It’s hard for them to communicate their findings to colleagues who lack basic data literacy.
  • Airbnb, a huge believer in the democratization of data science, strives to empower every team member to make data-driven decisions. To ensure that, the company created its own Data University.
  • Smart companies today ensure that many of their employees can speak the language of data and use it to improve work outcomes.

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The Democratization of Data Science

hbr.org

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