Quarterly report pursuant to Section 13 or 15(d)

Summary of significant accounting policies (Tables)

Summary of significant accounting policies (Tables)
6 Months Ended
Jul. 29, 2017
Accounting Policies [Abstract]  
Black-Scholes Valuation Model Weighted-Average Assumptions

The Company estimated the grant date fair value of stock options using a Black-Scholes valuation model using the following weighted-average assumptions for the periods indicated:


     26 Weeks Ended  
     July 29,
    July 30,

Volatility rate

     31.0     35.0

Average risk-free interest rate

     1.6     1.2

Average expected life (in years)

     3.5       3.5  

Dividend yield

     None       None