source:[1] YPF Sociedad (YPF) Tumbles on Lower Oil Prices, US-China Trade Spat (https://finance.yahoo.com/news/ypf-sociedad-y ...)[2] YPF Sociedad Anónima (NYSE:YPF) - Stock Analysis - Simply Wall St (https://vertexaisearch.cloud.google.com/groun ...)[3] Oil Prices Tumble As Competition Revives Supply | The Daily Economy (https://vertexaisearch.cloud.google.com/groun ...)