AMD is topping right now. We are currently seeing the descent of the third top. If you own this stock sell it.
I believe a lot of this increase in 2017 was due to their new Ryzen processors which were designed to gain control over Intel's market share. A portion of this growth is genuine because AMD is controlling a larger share of the market than they did...
AMD's chip is weaker than INTC's one in many regards, although an improvement compared to previous chips. I'd still like to own one, but the hype implied it'd beat INTC's offerings, which it didn't. Valuation and the fundamental factors at play imply we can short with comfort.
Good luck,
Ivan Labrie.