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Wall Street reacts to strong jobs report; Apple buys AI start-up; Facebook predicts the death of phone numbers

U.S. stocks (^DJI, ^GSPC, ^IXIC) look to hang on to early gains following a strong December jobs report.  The U.S. economy added 292,000 jobs last month while the unemployment rate remained flat at 5.0%. 

To discuss today's market movers and some of the other stories Yahoo Finance is keeping an eye on today, Alexis Christoforous is joined by Yahoo Finance's Nicole Sinclair and Kevin Mahn chief investment officer of Hennion & Walsh Asset Management.

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Municipal bond issuance tanked in December

Earlier this week, Puerto Rico defaulted on $37 million worth of its debt, and two bond insurers filed suit Thursday in Federal Court. Meanwhile, municipal and corporate debt issuance has been treading in negative territory since last year's China scare. Is all of this a bellwether of future problems in the municipal bond market?

Apple acquires Artificial Intelligence start-up

Apple buys artificial intelligence start-up Emotient. The company's technology reads people's facial expressions to determine their emotional states. What are some of the uses of this new technology and why is it a smart buy for Apple?

Will phone numbers become extinct?

Facebook thinks its messenger service is taking us to a world in which phone numbers become almost extinct. In a blog post this week, Facebook executive David Marcus wrote that 2016 will be the year when phone numbers show real signs of death. The app has grown to more than 800 million users. Is it a legitimate threat to traditional phones?