Jefferies analyst James Kisner recommends using the significant pullback in shares of Nimble Storage as a buying opportunity. Despite the missed Q3 revenue and disappointing Q4 guidance, Nimble's hybrid storage technology remains well differentiated and the total addressable market is large, Kisner tells investors in a post-earnings research note. He cut his price target for shares to $20 from $33 and keeps a Buy rating on the name. Piper Jaffray analyst Andrew Nowinski shares Kisner's thoughts on Nimble, but ten other research firms downgraded the stock this morning.