Stocks making the biggest moves premarket

$Dave & Buster's Entertainment (PLAY.US)$ – The entertainment-themed restaurant chain announced a series of new executive appointments, including the appointment of a new chief operating officer. The changes take effect August 1, and the stock gained 1.7% in the premarket.

$Pricesmart (PSMT.US)$ – The discount retailer's shares slid 4.2% in premarket trading after it reported lower-than-expected earnings despite sales that exceeded analyst estimates. PriceSmart was impacted by supply chain disruptions and excess inventory levels prompted by shifts in consumer demand.

$Canoo (GOEV.US)$ – The electric vehicle maker's stock soared 73.4% in the premarket after it struck a deal to sell 4,500 delivery vehicles to Walmart (WMT) for an undisclosed amount. Walmart also has an option to purchase up to 10,000 units.

$Lennar Corp (LEN.US)$ – The home builder's shares fell 1.7% in premarket trading after J.P. Morgan Securities downgraded the stock to "neutral" from "overweight" as the industry faces a number of headwinds, including softening sales and higher incentives.

$American Express (AXP.US)$ – American Express shares fell 2.6% in premarket action after Morgan Stanley downgraded the financial services giant to “equal-weight” from “overweight.” The firm said the risk of recession is not fully priced into American Express’ stock.