10 things you need to know before the opening bell

Here is what you need to know.

The Senate passes its tax bill. The Tax Cuts and Jobs Act passed through the Senate on Saturday by a vote of 51 to 49 with Sen. Bob Corker being the only Republican to vote against the bill. The bill can either be passed as is by the House - or the two chambers will go to a conference committee.

Stocks are set to open at all-time highs. The S&P 500 is on track to open higher by 0.66% near 2,660. Hong Kong's Hang Seng (+0.22%) led in Asia and Germany's DAX (+1.28%) is out front in Europe.

CVS Health is buying Aetna for $69 billion. The deal, which is the biggest of 2017, will pay Aetna stockholders $207 a share ($145 a share in cash and 0.8378 CVS shares per Aetna share).

Global market cap is about to hit $100 trillion and Goldman Sachs thinks the only way is down. The value of all stocks in all companies in all countries, globally, is about to hit $100 trillion and Goldman Sachs believes the "bull market in everything" is about to come to an end.

A mystery trader keeps betting that the stock market will go crazy. A trader just rolled over a massive volatility bet that could pay out $260 million if all goes according to plan.

Fed's Harker says next year is a wild card for rate hikes. Philadelphia Fed President Patrick Harker told Business Insider's Pedro da Costa low inflation may be a more persistent trend than previously believed, and that the Fed can take a wait-and-see approach to further monetary tightening in 2018.

Bitcoin hits new heights. The cryptocurrency hit a new all-time high above $11,800 a coin on Sunday. Currently its little changed near $11,338.

The UK and EU want to force bitcoin users to reveal their identities. The UK and other EU governments plan to regulate cryptocurrencies, including bitcoin, amid concerns they are being used for money laundering, the Guardian and Telegraph report.

Venezuela announces its a cryptocurrency backed by oil. In an effort to circumvent US-led sanctions, Venezuelan President Nicolas Maduro announced "petro," a cryptocurrency backed by Venezuela's oil reserves.

US economic data is light. Factory orders and durable goods orders will both be released at 10 a.m. ET. The US 10-year yield is up 3 basis points at 2.39%.