The IPPI declined 0.9% in April, following a 0.2% increase in March. Of the 21 commodity groups, 17 were down, 2 were up and 2 were unchanged. The main reason for the decline in April was lower prices for energy and petroleum products (-3.2%). The decline was led by lower prices for diesel fuel (-8.7%) and light fuel oils (-5.6%), while motor gasoline edged down 0.6%. Both motor gasoline and diesel fuel are commonly used as transportation fuels; however, prices for diesel fuel may vary as it is also used as a heating fuel. The demand for diesel fuel typically declines outside winter months, which can put downward ... (full story)