Traders work on the floor of the New York Stock Exchange.

U.S. Markets took a sharp turn to the downside after this morning's opening bell, rebounding shorty thereafter to near break even levels. Investors noted concerns over the Greek debt crisis as meetings were held with Eurozone leaders throughout the day.

Joseph Quinlan, Chief Market Strategist & Managing Director at U.S. Trust, Bank of America Private Wealth Management sees a buying opportunity for the medium and long term, especially in two sectors.