The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
Third meaning: Margins in investing. As an investment term, margin refers to buying shares of stock or other securities with a combination of the investor's own funds and borrowed funds. If the stock price changes between its purchase and sale, the result for the investor is leverage.