Currently, the major averages are posting strong gains, just off their best levels of the day. The Dow is up 129.84 points or 1.1 percent at 11,530.85, the Nasdaq is up 28.75 points or 1.1 percent at 2,641.58 and the S&P 500 is up 14.89 points or 1.2 percent at 1,218.98.
The markets are benefiting from optimism about the situation in Greece, with Greek Finance Minister Evangelos Venizelos due to hold another conference call with officials from the European Central Bank, European Commission and International Monetary Fund.
Venizelos called Monday's discussions with the officials "productive and substantive" as Greece seeks additional aid in an effort to avoid a default.