US STOCKS-Wall St edges up in quiet session; Nasdaq ends at record
* Trading quiet as investors await clarity on Greek debt
* Energy rises alongside oil prices; AT&T rallies on upgrades
* Facebook ends at record, its market cap surpasses Wal-Mart's
* Dow, S&P 500 and Nasdaq all rise 0.1 pct (Updates to close)
By Ryan Vlastelica
NEW YORK, June 23 (Reuters) - U.S. stocks ended with slight gains on Tuesday, with the Nasdaq eking out another record close while investors continued to await clarity on whether Greece could reach a deal to prevent defaulting on its loans.
The day's action was quiet, with trading volume below average. While energy shares rose alongside a jump in the price of crude oil, a sharp rise in the U.S. dollar capped broader gains.
While there were no major developments involving Greece, investors continued to hope that the country's newest budget proposals - introduced on Monday - would avert a looming default.
Greece needs fresh funds to avoid defaulting on a $1.8 billion debt repayment to the International Monetary Fund on June 30. Equities have been largely driven by Greece lately, with investors concerned that if the country defaults, it may have to leave the euro or the European Union, potentially shaking the region's economic foundations. Continuación...