I don't think I have ever used Walmart's "Price Match" policy but I know a lot of people that do and those people are upset today. Walmart announced that on May 14th they'll stop matching competitors' prices. The company made the announcement and sent an email to customers that said they're discontinuing the price match because they "already offer the lowest prices in most cases."

Walmart released a statement explaining the decision to Business Insider:

We are at our best when we deliver everyday low prices for our customers, and we've been focused on doing that through investments in price. And customers are noticing —we've seen a significant reduction in usage and redemption from Savings Catcher. As a result, beginning May 14 this year, Savings Catcher will no longer be offered as we continue to offer upfront, consistent low prices to customers shopping our stores.