Aswath Damodaran, NYU’s Legendary Valuation Expert, Recently Argues that there’s a 90% Chance Apple is Undervalued.  Here’s Why.   This comes in the wake of Apple shares’ breathtaking plunge from recent highs. (That’s be about $700 in September to $425 or so today.) In a new blog post, Sam Ro at Business Insider reports that Damodaran thinks that management can learn a few things from the recent market volatility, and he offers some advice.  Here are his four tips verbatim (emphasis courtesy of Business Insider’s Sam Ro:   Build up credibility with investors: The company has to regain credibility with investors. Apple…