Benzinga and Yahoo Finance LLC may earn commission or revenue on some items through the links below. A heated debate is splitting one of investing’s most level-headed communities, and it has nothing to do with stock picking or market timing. On r/Bogleheads—the forum dedicated to passive investing pioneer Jack Bogle’s principles—members are wrestling with a question that pits cold financial logic against something far less quantifiable: peace of mind. The issue? Whether to pay off ultra-low-rate mortgages ...