@vcvcbc:It's been a tough year for stocks. Not even blue chips have been immune to the weakness. Despite its recent recovery effort, the Dow Jones Industrial Average (^DJI -0.14%) is down 12% year to date. About half of the Dow's stocks are down even more. In some cases, they're down a lot more.Veteran investors of course know these beaten-down names are often the best buying opportunities. On the flip side, stepping into a stock solely because it's been so deeply devalued isn't enough -- there's still got to be a solid reason to own it at any price. Otherwise, there may be more downside left to dish out.With that as the backdrop, here's some food for thought if you're currently unsure about adding some sold-off, high-profile blue chips to your portfolio.Worst of the worstIf you're wondering, the