KUALA LUMPUR, Feb 20 — Petronas Dagangan Bhd (PDB) posted a lower net profit of RM276 million in its financial year ended December 31, 2020 (FY20) compared to RM829.54 million a year earlier as it was affected by external challenges including the sharp decline in petroleum product prices at the start of the year and the ensuing Covid-19-related movement restrictions.