DexCom: 50% gain during the month of October The second stock-split stock that's completely crushed the bear market of late is medical-device company DexCom (NASDAQ: DXCM). Shopify President Harley Finkelstein noted in an interview with CNBC following the release of his company's operating results that physical retail gross merchandise volume rose 35% in the latest quarter from the prior-year period. Historically high inflation is pinching the wallets of low-earning consumers and making small businesses think twice about upgrading to Shopify's higher-margin subscription services.