Why These Two Firms Downgraded ZS Pharma Stock By: Benzinga via Benzinga November 09, 2015 at 08:38 AM EST ZS Pharma Inc (NASDAQ: ZSPH) shares have gained 114 percent year-to-date, and are trading close to the high-end of their 52-week ... Read More >> Related Stocks: Astrazeneca Plc ADR