MFS Intermediate High Income Fund is a closed ended fixed income mutual fund launched and managed by Massachusetts Financial Services Company The fund invests in fixed income markets of the United States It primarily invests in high income debt instruments The fund benchmarks the performance of its portfolio against Barclays US HighYield Corporate 2 Issuer Capped Index It was formerly known as Colonial Intermediate High Income Fund MFS Intermediate High Income Fund was founded in July 21 1988 and is domiciled in United States