BUZZ-Restaurants: Fast-food workers kick off "Fight for $15" campaign
** Shares of fast-food chain operators down on nationwide protest by fast-food workers, demanding $15 an hour minimum wage and union rights
** Restaurants Brands International Inc's U.S.-listed shares down 2 pct at $35.01, Yum Brands Inc down 0.7 pct at $68.55, Wendy's Co down 0.7 pct at $9.34
** Organizers of "Fight for $15" campaign say strikes on Tuesday will be followed by rallies in 500 cities, aimed at gaining candidates' support heading into the 2016 U.S. presidential election
** Strikes and protests will include workers from McDonald's, Wendy's, Restaurants Brands-owned Burger King, Yum's KFC and other restaurants - campaign statement
** Shares of Good Times Restaurants Inc down 13 pct at more than a year low of $4.34, Habit Restaurants Inc down 4.5 pct at $23.76, Shake Shack Inc down 2.6 pct at $47.31, El Pollo Loco Holdings Inc down 2.2 pct at $11.47
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