Investors acted swiftly on 12 March driving shares of Geron down as low as 68.4% after it revealed the FDA had slapped a full clinical hold on the company's Phase II program for its experimental telomerase inhibitor imetelstat (GRN163L) over potential liver injury concerns.
Shares of the Menlo Park California-based biotech closed at $1.69, down $2.71, or about 61.6%.