It may be time to take another look at municipal bonds. These days, munis are cheap relative to corporate bonds, Bank of America said in a note Friday. "Muni weakness is not the driver here, but rather corporate richness," municipal research strategist Yingchen Li wrote. "We continue to advise investors to take positions while the muni market rally remains slow and ratios are somewhat cheap," he said. Municipal bonds have already had an "impressive" run in recent months, Haskell wrote in a note last week.

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Persons: Yingchen Li, Li, Patrick Haskell, Haskell Organizations: Bank of America, BlackRock