This article assesses the financial forecasts of small and medium-sized enterprises (SMEs) in their process of initial public offering (IPO). In particular, the quality of earnings forecasts is analysed and the determinants of accuracy of earning forecasts are explored. To this end, the empirical study considers all the companies listed on the Spanish Alternative Stock Market (MAB). The results show that managers of newly listed Spanish SMEs have mostly been optimistic and highly inaccurate when estimating their future earnings.Este artículo valora el proceso de previsión financiera de las pequeñas y medianas empresas (PYME) en sus salidas a bolsa. Específicamente, se analiza la calidad de las previsiones de las ganancias realizadas y se ex...