Yahoo finance website SPX historical closing price

Thanks for sharing the chart.  Would like to know what indices the chart uses and its web link.

The following are SPX historical closing price according to Yahoo finance website:

Dec 30/16 - 2238.83

Jan 31/17 - 2278.87

Feb 28/17 - 2363.64

Mar 31/17 - 2362.72

Apr 28/17 - 2384.2

May 31/17 - 2411.8

June 30/17 - 2423.41

July 31/17 - 2470.30

Aug 31/17 - 2471.65

Sept 29/17 - 2519.36

Oct 31/17 - 2575.26

March is a losing month, though a very slightly.