Up 90% in a month, why did Megaport shares just get downgraded?

Megaport Ltd (ASX: MP1) shares rocketed 19% higher last week, and set a new 52-week high of $21.16 on Friday.

The share price spike followed Megaport’s announcement that it had won four new AI infrastructure contracts worth $458.9 million.

The contracts necessitate major capital expenditure,…