A photocell is any of a wide range of sensors that react based on the presence of light or electromagnetic energy. They can be found in many different forms, from solar panels that use light to generate electricity, to photoresistors, which shift in resistance based on how much light is present.
Bond prices and yields are like a seesaw: when bond yields go up, prices go down, and when bond yields go down, prices go up. In other words, a move in the 10-year Treasury yield from 2.2% to 2.6% indicates negative market conditions, while a move from 2.6% to 2.2% indicates positive market performance.
As interest rates on U.S. Treasury notes rise, it means banks can raise the interest rates on new mortgages. Homebuyers will have to pay more each month for the same loan. It gives them less to spend on the price of the home. Usually, when interest rates rise, housing prices fall. Even though Treasury bonds have the lowest return, they have the biggest impact on mortgage interest rates. That's because investors who are in the market for mortgage-backed securities expect a higher interest rate on these higher-risk securities than on Treasurys. What are mortgage-backed securities?