Koss (KOSS), a small Milwaukee-based firm, has soared 800% in 2021 — from just under $3.50 a share to about $47. Koss shares were extremely volatile Thursday, swinging from big gains to a nearly 50% loss by midday. According to S3 Partners, about 19% of American shares are controlled by shorts. From CNN Business' Allison MorrowShort sellers are investors who bet that a stock is going to fall. 1 hr 44 min agoRobinhood bans buying GameStop, AMC and other Reddit darlingsFrom CNN Business' Matt Egan

Source: The Nation January 28, 2021 17:08 UTC