Wells Fargo shares tumble after net interest income falls short of estimates CNBCWells Fargo Shares Sink Premarket The Wall Street JournalWells Fargo (NYSE:WFC) Q2 Earnings Preview: Here’s What to Expect TipRanksWells Fargo Warns Cost-Cutting Efforts Have Started to Slow BloombergPre Q2 Earnings: How Should You Play Wells Fargo (WFC)? Yahoo Finance