Open market purchases raise bond prices, and open market sales lower bond prices. So, open market operations (OMOs) affect bond prices.When the demand for bonds ______ or the supply of bonds ______, interest rates fall. A) increases; increases. Labor market indicators pointed to steady employment levels but a shorter average workweek. Both input and selling price increases picked up. I also hope to show that when it came to money, Philadelphia was an innovator. In the colonial period, it set the standard for quality government paper money. The Philadelphia Gas Works (PGW), founded in 1836, was in 2015 the largest municipal-owned utility in the United States. Her argument is correct since lower interest rates make bonds less attractive to investors, resulting in the demand curve for bonds shifting to the left.