Defense stocks have taken off in 2017.

Defense stocks will be in focus Monday as continued saber rattling from North Korea throws global stability into question. 

Secretary of State Rex Tillerson has said that the U.S. is willing to negotiate with North Korean despot Kim Jung Un, but the mercurial leader has said that the country's nuclear arsenal is off the table, should negotiations ensue. 

Defense stocks have already had a strong run in 2017 with a Republican president in office to match a Republican controlled Congress, a party that traditionally increases defense spending. 

Waltham, MA-based government defense contractor Raytheon Co. (RTN - Get Report) has risen 22.44% year to date but was down 0.14% to $173.62 Monday morning.

Aerospace and security company Lockheed Martin Corp. (LMT - Get Report) shares have climbed 18.83% since the start of the year but the stock was even at $296.97 in early trading. 

Boeing Co. (BA - Get Report) has been the Dow Jones Industrial Average's top performer this year, climbing 52.7% over the past 8 months and was up 0.83% to $239.68 Monday. 

Northrop Grumman Corp.'s (NOC - Get Report) defense portfolio includes everything from missile systems to cyber command and control operations. The stock is up 15.76% year to date but was down 0.06% to $269.08. 

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