The Federal Reserve lowered the official discount rate to its lowest level in 18 years.

Literal

Federal-Reserve [topic-は] official-discount-rate [object-を] 18-years [in-で] lowest level [to-に] lowered.

連邦準備制度 ('Federal Reserve System'). 公定歩合 (こうていぶあい, 'official discount rate') is specialized financial vocabulary. ~で最低の水準 ('the lowest level in X years'). Highly technical economic news.