What you need to know on Wall Street today

The Federal Reserve is expected to raise its benchmark interest rate again on Wednesday. Here's what you need to know:

Only one thing matters at Wednesday's Fed meeting
Janet Yellen's farewell at the Fed has become more complicated
The Fed is about to raise interest rates again — here's how it happens and why it matters
The shrinking role of unions helps shed light on an economic trend that is puzzling Fed officials
Check back here for the latest news and analysis on the Fed's decision

Elsewhere in D.C. news, Republicans have a final deal on their tax bill — here's what's in it. And there's one more reason for Republicans to be very nervous about the Senate in 2018, according to Josh Barro.

And here's what it takes to launch a hedge fund right now, according to the Wall Street pros who know

And in tech news:

Apple's Shazam deal is a sneak attack to hit Spotify where it hurts
Finisar soars after Apple announces $390 million investment
RBC: Nvidia can’t profit from bitcoin anymore — but the boost from cryptocurrencies is just getting started
T-Mobile is becoming a cable TV provider
GOLDMAN SACHS: 4 big tech companies will own 65% of the cloud market
A Hungarian startup thinks it has the key to cheaper self-driving cars — but a ride in its test car suggests it has a lot of work ahead
As bitcoin skyrockets, a top Facebook exec is joining the board of Coinbase, the cryptocurrency exchange
A board member has resigned at Tezos, the tumultuous cryptocurrency startup that raised $232 million