J.C. Penney was up 5.1 percent at $8.48 while Nordstrom jumped 3.7 percent to $77.72 and was among the biggest percentage gainers in the S&P 500, while the S&P retail index was up 0.4 percent.
Analyze the relationship between 'Nordstrom' and 'retail' within the context of the input sentence.
Options: industry, director/manager, product/material produced, brand