RACHEL SAVAGE and MARC JONES NIGERIA'S government bonds fell heavily after rating agency Moody's downgraded the West African oil producer late on Friday to Caa1 from B3, saying the government's fiscal and debt position was expected to keep deteriorating. Longer-dated bonds were down the most, with the dollar-denominated 2051 Eurobond falling more than 2.8 cents in the dollar to 68.758 cents according to Tradeweb data. Only the Eurobond maturing this year fell less than 1 cent. "That is a significant move because there will be a lot of forced selling," Viktor Szabo, emerging market portfolio manager at Abrdn, told Reuters.…