2, 7호선 확장사업이 당초 정부 재정사업에서 민간투자사업(PPP)으로 전환됐는데 파라과이의 국가 신용등급이 투자부적격(BB-)으로 매겨져 있다.
The expansion project on lines 2 and 7 was initially converted from a government finance project to a private investment project (PPP), and Paraguay's national credit rating is rated as ineligible for investment (BB-).