The Dow Jones Industrial Average and S&P 500 edged higher Monday setting (again) all-time highs while the Nasdaq rose to its highest level of the year. Bank of America led the way in early trading after beating analyst estimates which helped investor confidence going into earnings season. But what can investors expect going into Tuesday?Tuesday’s Margin of SafetyImage courtesy of StockViewsOut of the 47 companies expected to report Tuesday, finbox.io data shows that 21 have a low uncertainty rating and only 4 of those 21 have a fair value estimate with a positive margin of safety. This may not come as a surprise to many investors with the market at all-time highs.Here are the 4 stocks that still have some upside: Microsoft, United Continental, Philip Morris and Helix Energy Solutions.Reading Between The MarginWith earnings season officially here, many top money managers have put up warning signs. Michael Lewitt at Money Morning also recently published an interesting piece on why the markets could get even scarier. Lewitt argues that the “massively overbought markets” may keep rising but recommends not chasing stock prices at current levels.Finbox.io’s fundamental data appears to support this claim - at least for the companies reporting earnings Tuesday. Approximately 80% of these stocks have a negative margin of safety.