MercadoLibre's shares slid 7% after the e-commerce platform posted flat year-over-year net income for the fourth quarter, with operating income coming in below estimates due to a tax hit. The company's revenue reached $4.2 billion, a 42% increase, but its adjusted EBITDA decreased by 20% to $375 million. Despite the revenue growth, the operating margin miss and the earnings shortfall led to a stock value decrease of up to 8.6% in pre-market trading, marking the most substantial decline in nearly two years for the Latin American e-commerce giant.