The Sharpe ratio for SPY at Yahoo Finance and MorningStar over the past three years is 1.31, but Quantopian is coming up with 2.10. Also, MorningStar has 2.51 for Sortino vs. Quantopian's 27.99.
Earth's orbit is the path in which the Earth travels around the Sun.iewed from a vantage point above the north poles of both the Sun and the Earth, the Earth would appear to revolve in a counterclockwise direction about the Sun. From the same vantage point, both the Earth and the Sun would appear to rotate in a counterclockwise direction about their respective axes.
The Earth rotates around once in 24 hours - that's a rate of 1000 miles per hour!. The time it takes for the Earth to rotate completely around once is what we call a day. It's Earth's rotation that gives us night and day. The combined effect of the Earth's tilt and its orbital motion result in the seasons.