Fed Chair Powell Says Economy Expanding, Inflation Remains Somewhat Elevated; Policy Stance Is Appropriate; Promotes Progress To Two Goals; Will Remain Attentive To Risks On Both Sides Of Mandate; Consumer Spending Resilient; Housing Sector Activity Weak; Repeats Labor Demand Has Clearly Softened; Effects Of Developments In The Middle East Are Uncertain; Estimate Feb PCE Inflation 2.8%, Core PCE At 3.0%; Elevated Inflation Largely Reflects Goods; Inflation Expectations In Near Term Have Risen