Wall Street's been underestimating Graham Holdings ( GHC ) for quite some time. Remember, 'misunderstood, but not mispriced.' That's why I told you back in July to hold the stock, don't sell it.I’m an equity analyst and founder of Goulart’s Restaurant Stocks, a research firm focused on the U.S. restaurant industry — from quick-service and fast casual to fine dining and niche concepts. I lead all thematic research and valuation efforts, applying advanced financial modeling, sector-specific KPIs, and strategi ...