By Puyaan Singh and Bhanvi Satija (Reuters) -AbbVie shares fell over 12% on Monday after an experimental schizophrenia drug the company acquired last year failed two mid-stage studies, widening rival Bristol Myers Squibb's lead in the market for new treatments for the condition.

AbbVie said a recently acquired drug candidate for schizophrenia missed the key goal in mid-stage studies, pushing its stock sharply lower. Phase 2 studies for emraclidine failed to show a statistically significant improvement in symptoms after six weeks,

AbbVie Inc. shares fell the most in three years after two mid-stage trials of its drug to treat schizophrenia failed to meet their primary goal, a blow to the company’s $8.7 billion acquisition of Cerevel Therapeutics earlier this year.