vm/E+ via Getty Images The last time I wrote about Materialise NV (NASDAQ:MTLS), I suggested that macro headwinds and ongoing investments would probably limit near-term upside, despite the company's favorable valuation. The stock is now up over 20% since then on the back of stronger-than-expected Q2 results. Growth investments and the transition to a cloud-based software business continue to weigh on margins and growth, but Materialise's business appears to be turning the corner. Headwinds should ease over ...