NEW YORK (TheStreet) -- Gruma SAB (GMK, Cervezas (CCU - Get Report), Anheuser-Busch (BUD, Concha y Toro Winery (VCO, Panasonic (PC, Unilever (UL and Sony (SNE - Get Report) are stocks that could add weight to portfolios in the present uncertain market conditions.The U.S. debt ceiling concerns have pushed the S&P 500 to one-month lows. The index stocks corrected 3% in the past week on the risk of a default if the debt ceiling is not raised. In this scenario, stocks that are relatively less volatile could balance a portfolio. We have selected companies that seem less volatile and could help cut losses in the event of a further downside. These stocks carry an average monthly beta of 0.74 and have an upside of 28% over the next one year. Besides, they carry a mean buy rating of 52%. The stocks are stacked by upside, great to greatest. >> Keep the stock market at your fingertips with TheStreet's iPad app.