Futures for U.S. markets pointed higher late Monday, as investors continue to celebrate rosy earnings and robust dealmaking.

The S&P 500 and the Dow Jones Industrial Average were both up 0.06% as Nasdaq gained 0.09% at 9:42 p.m. EDT.

Investors are wagering earnings news will continue to be primarily positive as iPhone juggernaut Apple (AAPL) - Get Report and consumer goods company P&G (PG) - Get Report report Tuesday. Investors are also heartened that major companies are still willing to splash out on each other on the back of AT&T's (T) - Get Report proposed $85 billion cash-and-stock purchase of Time Warner (TWX) .

The upbeat mood pushed all indices into the green in regular Monday trading, with the S&P closing 0.47% higher, the Dow 0.43% in the green and Nasdaq a solid 1% above Friday's final price.

European traders weren't so optimistic earlier in the day with Germany's Dax ending Monday 0.47% higher and France's Cac, 0.36%, while the FTSE in London lost 0.49%.

Early in the start of trading Tuesday, Asian indexes were also mixed with a lower yen supporting exporters but a slowdown in South Korean growth worrying investors there. Japan's Nikkei was up 0.63%, while the Kospi in South Korea was off 0.69% at 10:01 p.m. EDT. The Hang Seng in Hong Kong pared 0.14% and Australia's ASX was up 0.69%.

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The yen added 0.2% to ¥104.429 versus the dollar while the pound gained 0.027% to £0.8184.

In energy, oil remained above the $50-per-barrel level, even after industry standard Brent crude slipped 0.27% to $51.32 while its West Texas brethren slid 0.18% to $50.43 at 10:10 p.m. EDT. Prices are per-barrel for a future delivered in December.

In after-hours trade, shares of burger chain Sonic (SONC) tumbled 11.29% to $23.50 after it posted revenue that fell short of analysts' expectations for the fiscal 2016 fourth quarter and full year.

After the closing bell, Oklahoma City-based Sonic reported revenue of $162.1 million for the fourth quarter, below Wall Street's projections for revenue of $167.3 million. Adjusted earnings of 45 cents per share topped analysts' estimates by a penny.

System-wide same-store sales declined 2% year over year in the quarter, which met analysts' forecasts.

In gainers, shares of chipmaker Rambus (RMBS) - Get Report climbed 6.67% to $12.79 after it posted earnings and revenue that beat analysts' expectations. Sunnyvale, Calif.-based Rambus reported adjusted earnings of 16 cents per diluted share, exceeding analysts' projections of 13 cents per share.

Revenue jumped 22% to $89.9 million year over year and was above analysts' forecasts of $86.6 million. The increase was due to higher revenue from sales of memory products and security technology development projects.

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