Take context from the input text and decide on the accurate relationship between 'Pimco' and 'Investment Management' from the options provided.
Options: product/material produced, original broadcaster, operator, position held

Pacific Investment Management Co, which is known as Pimco and is a unit of Germany's Allianz SE, said the Pimco Total Return Fund increased its holdings in U.S. government-related securities to 19.6 percent in June, up from 8.5 percent in May.
product/material produced