Friday brought a wave of analyst downgrades across several sectors, with Wall Street's top research teams pulling back their enthusiasm on companies ranging from building materials to aerospace.

The most notable move came from Truist Securities analyst Keith Hughes, who downgraded Eagle Materials Inc. (EXP) from Buy to Hold while slashing the price target from $280 to $210. That's a 25% haircut to expectations, signaling significant concerns about the building materials company's near-term prospects. Eagle Materials shares closed at $223.69 on Thursday.

In what might seem like a contradictory signal, Raymond James analyst Savanthi Syth downgraded Allegiant Travel Company (ALGT) from Strong Buy to Outperform while simultaneously raising the price target from $78 to $98. The airline's stock closed at $85.74 on Thursday. This type of move typically suggests the analyst still sees upside potential but believes the risk-reward balance has shifted as the stock approaches fair value.

Defense giant Lockheed Martin Corp. (LMT) also lost some of its shine. JP Morgan analyst Seth Seifman moved the rating from Overweight to Neutral, though he increased the price target from $465 to $515. With shares closing at $470.14 on Thursday, that new target still implies roughly 10% upside, but not enough to warrant an overweight position in portfolios.

The harshest assessment came from Barclays analyst Adam Seiden, who downgraded AGCO Corp. (AGCO) from Equal-Weight all the way to Underweight. The agricultural equipment manufacturer saw its price target slashed from $116 to $93, well below Thursday's closing price of $106.86. An underweight rating suggests the analyst expects the stock to underperform its sector peers.

These rating changes reflect shifting analyst perspectives on company fundamentals, sector dynamics, and valuation levels. When multiple firms adjust their outlooks simultaneously, it often signals broader concerns about industry trends or macroeconomic headwinds affecting specific sectors.