Santee Cooper could be bought by other power companies in South Carolina.
The S&P 500 has returned 10% year to date, while the top half of it, around 16%.
Stock futures suggest the Dow Jones Industrial Average could dip below 22,000 when markets open Thursday.
The labor market goes under inspection and Apple releases its earnings report.
The Nasdaq closes at a record for the third session in a row as volatility holds at its lowest level in more than two decades.