This paper studies the dynamics of Portuguese investment throughout the past years. This important economic variable has been decaying since the beginning of the century. The mag-nitude of this development was amplified by the Global Financial Crisis and subsequent Euro-pean Debt Crisis. This paper starts by summarizing relevant stylized facts, a to describe per-tinent developments on investment dynamics. Besides studying aggregate dynamics, we de-compose investment into different sectors and assets, in order to understand their role in recent dropout. The results point that part of this investment slowdown is probably explained by output dynamics. Other important determinants as uncertainty, financial fragmentation, high leverage and market structure are proven to influence investment over the span of the analysis.