Due to overcapacity, this product is already in oversupply.
Tips
usage
Standard business and economics vocabulary. Antonym: 供不应求 (demand exceeds supply). Note that 供 here is read gōng (supply), not gòng (offer reverently).
mistakes
供 is a heteronym: gōng for 供应/供给 (supply, used here) vs gòng for 供奉/供品 (make offerings to). Here it is always gōng.