Another Nail in the JFK Conspiracy
{https://hbr.org/2015/10/two-ways-to-keep-your-data-from-tricking-you}

Two Ways to Keep Your Data from Tricking You
https://hbr.org/2015/10/two-ways-to-keep-your-data-from-tricking-you

Excel links
{http://adamhgrimes.com/blog/basic-backtesting-in-excel-getting-data/}
{http://adamhgrimes.com/blog/basic-backtesting-in-excel-more-data/}