Wall Streets wild week shows just how fragile confidence in the stock market has become MarketWatch

Unsettled tariff policy makes ‘conjecture’ about company earnings a ‘borderline waste of time,’ says Morgan Stanley’s Andrew Slimmon

Lumentum’s stock performance ranks sixth in the S&P 500 this year. Now the optical company is set to join the Nasdaq-100.

Steven Goldstein is based in London and responsible for MarketWatch's coverage of financial markets in Europe, with a particular focus on global macro and commodities. Previously, he was Washington b……