Gas and groceries are expensive, and many consumers are feeling low. The off-price retailer’s shares are up some 25% since Barron’s recommended them late last year, dwarfing the gains made by the S&P 500 and speeding well ahead of its peers tracked by the exchange-traded fund and the State Street Consumer Discretionary Select Sector SPDR ETF That strength can continue. Last month, Burlington delivered a beat-and-raise earnings report for its fiscal first quarter, with growth across categories.