Tomorrow has three pieces of data that may affect mortgage rates, including one that is considered highly important to the markets. That will be March's Retail Sales data at 8:30 AM ET. This Commerce Department report gives us a measurement of consumer spending, which is extremely important because that category makes up over two-thirds of the U.S. economy. Forecasts are calling for a large increase of 5.4% in spending, fueled by the economic stimulus checks that went out last month. A jump of that size would normally be concerning to the bond market. However, since it is artificially boosted by the stimulus funds, we shouldn’t see a noticeable reaction unless the increase was much higher or lower than expected. The weaker the level of spending, the better the news it is for mortgage pricing.