Energy (as measured by Energy Select Sector SPDR ETF (NYSEARCA:XLE)) is the best performing major sector in the US market this year up more than 8% vs. the 5.2% advance for the S&P 500 (INDEXSP:.INX).  It had been a forgotten pocket of the equity market after last year’s poor performance closing flat while the S&P 500 closed up 14% in 2012. But it’s off to a blistering start this year as WTI crude oil prices have rallied more than 5% in 2013.   How closely has XLE followed WTI oil prices over the last few years?  Here is a ...