UPDATE: Twitter's stock drops after Oppenheimer turns bearish following price surge
UPDATE: Twitter shares slump after downgrade to underperform
Twitter shares slump after downgrade to underperform
Oppenheimer has about $3.5 billion in Puerto Rican debt spread across 19 funds, according to Morningstar.
Of the muni bond funds tracked by Morningstar Inc., OppenheimerFunds stands out as the biggest fan of debt issued by financially-strapped island nation.