What is the relationship between Volkswagen Group and NASDAQ in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Mighty Volkswagen Group ( NASDAQ Other:VLKAY ) reported that its sales in China fell almost 4% in the first six months of 2015.

Answer: stock_exchange