The S&P 500 Index has been on an incredible rally this year, achieving new milestones and gaining 13.6% so far. The index has now crossed the 5,400 level for the first time after hitting the 5,300 threshold last month, underscoring strong confidence. The latest leg of the rally came on cooler-than-expected inflation data despite hawkish commentary from the Fed (read: ETFs in Focus on the Upcoming S&P 500 Shake-Up).SPDR S&P 500 ETF Trust (SPY) , the proxy version of the S&P 500 Index, has gained 13.3% in the ...