One of the only manufacturers of immersion lithography systems is a Dutch company that is a component of what stock market index?
Immersion lithography:  ASML, Canon, and Nikon are currently the only manufacturers of immersion lithography systems. ASML Holding: ASML is a Dutch company and currently the largest supplier in the world of photolithography systems for the semiconductor industry. ASML Holding:  The company is a component of the Euro Stoxx 50 stock market index.
Euro Stoxx 50