NEW YORK (TheStreet) -- Here are 10 things you should know for Tuesday, Dec. 23:

1. -- U.S. stock futures were rising slightly on Tuesday pointing to a fifth straight day of gains ahead of a session packed with economic data.

European stocks were higher after trading mixed earlier Tuesday. Asian shares closed mostly lower.

2. -- The economic calendar in the U.S. on Tuesday includes durable goods orders for November at 8:30 a.m. EST, the third estimate of third-quarter GDP at 8:30 a.m., the FHFA Housing Price Index for October at 9 a.m., the University of Michigan Sentiment Index (final) for December at 9:55 a.m., personal income and personal spending for November at 10 a.m., and new home sales for November at 10 a.m.

3. -- U.S. stocks on Monday rose on below-average volume as there was little news to spur action.

The S&P 500 added 0.38% to 2,078.54, its 50th record high close of the year, while the Dow Jones Industrial Average climbed 0.87%. The Nasdaq gained 0.34%.

4. -- Family Dollar (FDO) is expected to adjourn Tuesday's vote on a proposed sale to Dollar Tree (DLTR) , delaying a decision on the acquisition for a second time, a source familiar with the situation told the Charlotte Observer.

Institutional Shareholder Services this month urged Family Dollar investors to oppose the current Dollar Tree takeover offer and postpone Tuesday's meeting to vote on the deal. Not accepting the current transaction won't jeopardize an eventual deal with Dollar Tree and could result in a higher price, ISS said in its report, the Observer said.

Family Dollar is trying to be acquired by Dollar Tree for $8.5 billion in cash and stock, even as it fends off a hostile, $9.1 billion all-cash bid from Dollar General (DG) .

5. -- Comcast's (CMCSA) proposed $45.2 billion purchase of Time Warner Cable  (TWC) has again been delayed because Time Warner Cable failed to deliver documents to the Federal Communications Commission in a timely manner.

Time Warner Cable was expected to submit more than 31,000 documents on Monday.

The FCC review will be paused until Jan. 12.

6.
-- Drugstore chain Walgreen (WAG) is expected by analysts on Tuesday to report fiscal second-quarter earnings of 43 cents a share on revenue of $7.38 billion.

7. -- Apple (AAPL) has pushed out its first-ever automated security update to Macintosh computers to help defend against newly identified bugs that security researchers have warned could enable hackers to gain remote control of machines, according to Reuters.

Apple pushed out the software on Monday to fix critical security vulnerabilities in a component of its OS X operating system called the network time protocol, or NTP, Apple spokesman Bill Evans told Reuters. NTP is used for synchronizing clocks on computer systems.

The buyer is a unit of Switzerland-based investment firm Reuben Brothers. Goldman didn't disclose the value of the deal.

10. -- Gilead Sciences  (GILD)  shares fell 14.3% on Monday to $92.90 after its hepatitis C drugs, Sovaldi and Harvoni, were to be excluded from Express Scripts' (ESRX) formulary beginning Jan. 1.

AbbVie (ABBV) agreed to significantly discount the price of its Viekira Pak hepatitis C therapy in exchange for exclusive access to Express Script's 25 million customers, pushing out Gilead.

-- Written by Joseph Woelfel

To contact the writer of this article, click here:Joseph Woelfel

Follow @JoeWTheStreet

More from Stocks

Week Ahead: Trade Fears and Stress Tests Signal More Volatility To Come

Week Ahead: Trade Fears and Stress Tests Signal More Volatility To Come

3 Great Stock Market Sectors Millennials Should Invest In

3 Great Stock Market Sectors Millennials Should Invest In

Why Millennials Are Ditching Stocks for ETFs

Why Millennials Are Ditching Stocks for ETFs

Trump's 'Space Force' Could Launch a $1 Trillion Industry, Morgan Stanley Says

Trump's 'Space Force' Could Launch a $1 Trillion Industry, Morgan Stanley Says

Abiomed Stock Should Rise Some 12% From Here, Piper Jaffray Analyst Says

Abiomed Stock Should Rise Some 12% From Here, Piper Jaffray Analyst Says