The economy is still at risk of a 'sudden stop' despite January's massive job growth, Larry Summers says

• Larry Summers warned that there could be a "sudden stop" in the economy this year.
• Summers made the comments after a strong January jobs report sent the unemployment rate to 3.4%.
• "It's as difficult as an economy to read as I can remember," Summers told Bloomberg.

The US economy could see a "sudden stop" and even fall off a cliff later this year, according to former Treasury Secretary Larry Summers.