Last week’s economic reports included readings from the National Association of Home Builders on housing markets and Commerce Department data on housing starts and building permits issued. Weekly reports on mortgage rates and jobless claims were also released. NAHB: Builder Confidence Slips as Materials Costs Rise The National Association of Home Builders reported that its Housing Market Index fell to an index reading of 82 in March as compared to February’s index reading of  84. Analysts forecasted a reading of 83. Builder concerns included rising materials costs and mortgage rates, which impact home pricing and affordability.  Robert Dietz, Chief Economist…