What is the relationship between Vertex Pharmaceuticals 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.

du Pont de Nemours and Co. (DD) $53.15 -1.39% Procter & Gamble Co. (PG) $74.14 -1.32% Nasdaq 100 - Risers Dollar Tree Inc (DLTR) $80.93 +1.97% CH Robinson Worldwide Inc (CHRW) $70.86 +1.59% Vertex Pharmaceuticals Inc. (VRTX) $141.67 +1.37% Biogen Inc (NasdaqGS: BIIB - news ) (BIIB) $315.89 +1.20% Symantec Corp. (SYMC) $21.86 +0.97% Analog Devices Inc (NasdaqGS: ADI - news ) .

Answer: stock_exchange