In times of doubt, join our club, could well be the message from Walmart as it plans expansion of its Sam’s Club stores amid increasing competition with Costco and BJ's.

In a bid to stay competitive with Costco and BJ’s Wholesale Club’s ambitious expansion plans, Sam's Club will ramp up its own plans.

Costco often seems like a company jogging slowly because it understands how long the race is. Competitors make bold moves, expand quickly, have a moment, and then disappear. While that happens, the leading warehouse club adds 15-25 or so new locations each year while tweaking its operations and merchandise.