June 22 (Reuters) - U.S. Federal Housing Finance Agency home price index: Apr Mar (Prev) Apr 2015 Pct change +0.2 +0.8 +0.7 +5.9 Index 233.8 233.2 233.1 220.8 NOTES: The home price index is calculated using purchase prices of houses financed with mortgages that have been sold to or guaranteed by Fannie Mae or Freddie Mac.