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.
If the interest rate surges by 100 basis points (bps) to 5%, then bondholders with a 4% coupon rate are more likely sell the bond and keep the money with a bank account instead. This selling pressure will adjust bond prices downwards. Hence, at higher interest rates, bond prices will generally be lower.