There might be a bright future for DirecTV after all.The broader stock market might not have had a thrilling Monday, but there was plenty of action and interest in AT&T (T 2.91%) shares. The telecom company was the subject of hot speculation in the satellite broadcasting world, and investors bid up its share price by nearly 3% on the scuttlebutt. This was more than sufficient to crush the S&P 500 index's performance, as the indicator closed only marginally higher.An old merger idea revived?After market hour ...