Just_Super/iStock via Getty Images Investment Thesis NetApp (NASDAQ:NTAP) stock has gained about 67.03% over the last year, outpacing the S&P 500 by a margin of about 40.8%. Seeking Alpha While this solid performance could be attractive to investors, I believe we ought to be rational enough before making any investment based on this past performance alone. In the wake of the evolving IT industry, I believe investors should invest in companies that not only lead in innovation but also offer sustainable growt ...