ReutersStock futures fall in jittery market ahead of dataReutersNEW YORK (Reuters) - Stock index futures were lower on Tuesday as investors awaited data on housing and consumer confidence to gauge the pace of the economy recovery. US home prices likely eked out a small gain in June, ...Home Prices in 20 US Cities Rose More Than Forecast in JuneBloombergHome-Price Gains DecelerateWall Street JournalU.S.