Elon Musk, the wealthiest man ever, may soon see his fortunes diverge as Tesla faces a rollercoaster ride while SpaceX's valuation continues to move in a step function.

Tesla Inc. (NASDAQ: TSLA) unit sales dropped 1.1% from 1,189,226. It was the first annual falloff in Tesla’s history. Tesla’s stock pulled back as much as 7% on the news, taking Elon Musk’s net worth down $17.

Elon Musk's SpaceX said on Friday its upcoming Starship test flight would include the rocket's first attempt to deploy payloads in space by releasing 10 model Starlink satellites, a key demonstration for Starship's potential in the satellite launch market.

As SpaceX prepares for a possible Jan. 10 launch of its Starship rocket, Elon Musk's company says it's made special improvements in time for the seventh flight test out of South Texas. "The upcoming flight test will launch a new generation ship with significant upgrades,

During its next test, currently scheduled for Jan. 10, the Starship vehicle will carry a payload meant to replicate 10 next-generation Starlink satellites.