No, Walmart’s Q4-2017 ended on January 26, 2018. Q4-2018 doesn’t start for several months.
http://s2.q4cdn.com/056532643/files/doc_financials/2018/q4/Q...
http://s2.q4cdn.com/056532643/files/doc_financials/2018/q4/Q...
http://stock.walmart.com/investors/financial-information/qua...
If your fiscal year goes from Feb 1 2017 - Jan 21 2018, then that is commonly referred to as FY 2018