The latest slide followed a sharp Tuesday retreat that exceeded the 4% decline reported earlier in the session. Brent settled 5.3% lower at $79.36 a barrel, its first close below $80 since July 13. WTI settled 5.7% lower at $75.77. Both contracts reached their lowest closing levels in three weeks. The Tuesday losses extended Monday’s drop, when Brent fell 7% and WTI declined 5.1%.