All three major indices climbed to record highs on Monday.

First up, the scoreboard:

    Dow: 22,531.78, +148.19, (0.66%) S&P 500: 2,528.05, +8.69, (+0.34%) Nasdaq: 6,512.93, +16.98, (+0.26%) US 10-year yield: 2.339, +0.013 The US dollar index: 93.59, (+0.55%)

1. At least 58 people were killed and more than 515 were injured Sunday night in Las Vegas in the deadliest shooting in modern US history. A gunman identified as Stephen Paddock opened fire from the 32nd floor of the Mandalay Bay Resort and Casino, aiming into a tightly packed crowd of thousands of people who were watching a country music festival, police said.

2. Shares of major gun manufacturers rose in trading on Monday. Gun stocks tend to rally after mass shootings. Heightened conversation about potential gun-control legislation raises speculation that people would want to buy firearms sooner rather than later before any regulations could be tightened.

3. Casino stocks tumbled. MGM Resorts International, which owns the Mandalay Bay hotel from where the gunman opened fire, was down about 5%. Wynn Resorts Ltd, Las Vegas Sands Corp, and Melco Resorts & Entertainment Ltd also fell in pre-market trade, although several of them saw a reversal later in the day.

4. The euro tumbled after the Catalan leader said the region "won the right" to an independent state. Tensions rose in Spain over the weekend when Catalonia attempted to vote on independence Sunday in a referendum that was declared illegal by Spanish authorities. Analysts at BMI Research said in a note to clients Monday that tensions between Catalonia and Madrid will remain "elevated for the foreseeable future."

5. Nordstrom tumbled after a report said the company is struggling to go private. Shares were down over 7% after a report from the New York Post said it was exploring the possibility of going private amid struggling sales, but the deal began unraveling after Toys R Us filed for bankruptcy.

6. Shares of other department stores also sank after the Nordstrom report crossed. JCPenney was down by 8.3%, Dillard's was down by 7.1%, Macy's was down by 5.6%, and Kohl's was down by 4.1% in the afternoon.

Monday's US economic data: Markit US Manufacturing PMI came in at 53.1 in September, above expectations of 53.0, while ISM manufacturing came in at 60.8 last month, above expectations of 58.0.

ADDITIONALLY:

Stocks are flashing a major sell signal.

A top GOP senator just showed by tax reform may be harder than Trump thought.

A $732 billion investor says Wall Street is seriously underestimating Trump's tax plan.

Hedge funds are "dancing on the rim of a volano."

Deutsche Bank thinks GM could release a self driving car "within quarters, not years."

Goldman Sachs is flirting with bitcoin trading, according to the Wall Street Journal.