The Bottom Line: Nelson Peltz, who has been heavily involved in the fast-food chain for two decades, is moving closer to a purchase. But his track record doesn’t inspire much confidence.

The Bottom Line: This week’s edition of the weekly restaurant finance newsletter looks at profit challenges at Jack in the Box, Subway, and other brands.

Food Writer’s Diary: The sauce made of canned tuna is becoming a darling of independent restaurants across the country.