E-commerce specialist Etsy (NASDAQ:ETSY) — which focuses on handmade or vintage items and craft supplies — saw its shares pop higher on activist investing news. Specifically, Elliott Management partner Marc Steinberg will join the company’s board of directors. In addition, the activist firm disclosed a “sizable” investment in ETSY stock, which could also benefit from bullish speculation.According to CNBC, Elliott built a roughly 13% position in ETSY stock, per a person familiar with the matter. This economi ...