MFS Intermediate High Income Fund is a closed ended fixed income mutual fund launched and managed by Massachusetts Financial Services Company. It invests in fixed income markets of the United States. The fund primarily invests in high income debt instruments. It benchmarks the performance of its portfolio against Barclays U.S. High-Yield 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.