Neutrophils are the most common type of white blood cell, comprising about 50-70% of all white blood cells. They are phagocytic, meaning that they can ingest other cells, though they do not survive the act. Neutrophils are the first immune cells to arrive at a site of infection, through a process known as chemotaxis.
One of the basic theories stipulates that increasing interest rates raise consumers' and manufacturers' costs, which, in turn, reduces the amount of time and money people spend driving. Less people on the road translates to less demand for oil, which can cause oil prices to drop.
Crude oil is the underlying commodity that drives the price of oil stocks. Massive global production of crude oil has led to a 50% drop in the price of oil from its 2015 peak.This oversupply of crude oil has caused oil companies to delay or cancel projects, which has caused a decline in performance.il stocks have taken a huge hit in 2015. This market-wide decline in oil stocks is due to weak consumer demand, record production from the United States, a rising dollar and weaker corporate profits.