Take context from the input text and decide on the accurate relationship between 'Baidu' and 'search engine' from the options provided.
Options: product/material produced, stock exchange, position held, member of

Chinese Internet search engine Baidu (NASDAQ:BIDU) was downgraded early Wednesday, while drugmakers Valeant Pharmaceuticals International (NYSE:VRX) and Shire (NASDAQ:SHPG) also saw analyst action.
product/material produced