Europe shares make biggest weekly gain in 6 months By: Reuters: Company News March 25, 2011 at 14:15 PM EDT * Index rises 3.3 pct over the week, biggest gain in 6 mths * Uncertainty persists on Portugal, euro zone debt Read More >> Related Stocks: Astrazeneca Plc ADR BP Plc ADR Banco Santander Chile ADR Gsk Plc ADR Sanofi-Aventis S.A. ADR Yamana Gold