Chip makers were also among the top five percentage gainers in the Nasdaq 100 since the index closed at its 2015 low on Aug. 25, with SanDisk topping the list with a 70 percent jump on the back of a takeover bid from Western Digital.
Analyze the relationship between 'SanDisk' and 'Nasdaq' within the context of the input sentence.
Options: founded by, member of, stock exchange, headquarters location