(Bloomberg) -- Petroleo Brasileiro SA investors who’ve ridden a 25% rally in shares this year are now confronted with a wave of analyst downgrades on concern that below-market fuel prices and higher spending will erode what’s been a multibillion-dollar dividend bonanza.Most Read from BloombergBiden Fears China Economy Is ‘Ticking Time Bomb’Jeff Bezos Buys $68 Million Home on Florida’s Exclusive Indian Creek IslandRetirees Face $17,400 Cut to Social Security Benefits in 2033Maui Now Looks a Lot L