Dollar hits four-month high vs yen, stocks slide

By Herbert LashNEW YORK (Reuters) - The dollar hit a four-month high against the yen but global equity markets turned lower on Tuesday as investors awaited testimony by Federal Reserve Chair Janet Yellen this week and any signs of tighter U.S. monetary policy.U.S. stocks reversed early gains to edge lower after President Donald Trump's eldest son released an e-mail chain related to a meeting with a Russian lawyer linked to the Kremlin during last year election campaign.Europe's main bourses earl