With stock valuations on the cheap side and hordes of retail investors still sitting on the sidelines, Charles Schwab Chief Investment Strategist Liz Ann Sonders says it’s more likely that we’ll see a “melt-up” in the market than a “melt-down”. Sonders tells Yahoo! TechTicker that she thinks earnings estimates are still “marginally low” for the second quarter, and talks about the method she uses to assess the market’s valuation.