All the major US stock indices declined by 1.4% to 2.4% between record market close on Wednesday, February 19 and market closed on Friday, February 21. They have declined even more thus far this week. The decline has been attributed to increasing concern that Corentine in China and travel restrictions to and from China associated with the continuing spread of the coronavirus were disrupting US companies' supply chains and exports to China from the US.

A) What do you think happened to prices and to yield of US treasury bonds during this two day period? (Exact numerical answer not needed. Just identify the direction of change in prices in the direction of change in yields. )

B) Explain your answer in part A.

C) Draw a supply and demand diagram of the US treasury market to illustrate the direction of change in the prices of treasury securities mentioned in the above quote. Label your graph, including axes clearly.