Italy's no vote on a constitutional reform package and its prime minister's subsequent resignation dominated headlines Monday, but it didn't do much to spook markets, which posted a day of solid gains.

The Dow Jones Industrial average closed at another record high on Monday, led by financials and energy. In other important business news, a trial over Aetna's (AET) planned $37 billion bid to acquire Humana (HUM) - Get Reportkicked off. The Department of Justice filed a lawsuit in July to block the deal. Amazon (AMZN) - Get Reportunveiled Amazon Go, a new line of physical grocery stores that don't require a checkout line.

Fallout from the U.S. Army Corps of Engineers' decision Sunday not to grant pipeline operators Energy Transfer Partners (ETP) and Sunoco Logistics (SXL) a permit to construct the controversial Dakota Access pipeline project continued, sending shares of both companies tumbling early in the day. The Trump team's reiteration it supports the project reassured investors.

In case you missed it, here are some other notable headlines from TheStreet and its sister publications, RealMoney and The Deal.

Trump Candidate for Top Bank Supervisor Post, Hoenig, Eyes Big Bank Breakup
The FDIC vice chairman put a spotlight on his push to reinstate a statute effectively separating the investment banking units of large financial institutions from their commercial bank divisions. Full story

EU: Facebook, Twitter, Google, and Microsoft Aren't Responding Quickly Enough to Hate Speech
U.S. tech giants haven't done enough to cut down on hate speech across their platforms, the European Commission said on Sunday. Full story

Just in Case, Gawker Files for Exclusivity Extension
The bankrupt media company wants more time to file an alternate liquidation plan if the plan out for votes can't get confirmed on Dec. 13. Full story

Hilton Worldwide to Spin Off Timeshare Business, Park Hotels Unit, Split One for Three
Hilton Worldwide received approval to spin off its Park Hotels & Resorts and Hilton Grand Vacations subsidiaries and conduct a reverse 1 for 3 stock split. Full story

Under Armour Continues to Embarrass Nike
Under Armour is scoring big deals, much to Nike's dismay. Full story

Cramer: What Was Bad Yesterday Is Good Today 
How can the same things that sent us down not that long ago actually be totally ignored now? Full story

Vanguard Whistleblower Sues Mutual Fund Giant for Wrongful Termination, Distress
Seventeen days after broker Karen Brock told TheStreet about problems with Vanguard's customer account security, the firm fired her. Now she says in a lawsuit that Vanguard violated whistleblower laws. Full story

Tweet of the Day:

Video of the Day: Former Senator Joe Lieberman on Why Donald Trump Won the Presidency

Amid the rise of populism, as illustrated in Italy's referendum Sunday, former Connecticut Senator Joe Lieberman on why he thinks Donald Trump won the presidential election. Full story

Chart of the Day: Charting Jim Cramer's Top 10 Takeout Candidates for 2017: Marvell Technology

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Marvell looks headed higher in 2017. Full story