Nucor (NUE) is sliding sharply in Wednesday trading (May 6, 2026), with the selloff largely tracking a reset in expectations after a strong run-up. A key catalyst weighing on the tape is a recent UBS downgrade to Neutral that flagged valuation as stretched following roughly a 36% rally since late March and warned the stock’s multiple sits near a decade-high versus forward EV/EBITDA comparisons, increasing downside risk if steel pricing normalizes or import pressures increase.

The downgrade narrative is centered less on near-term operations and more on what investors are paying for them. UBS pointed to the risk that U.S. steel pricing could be pressured by imports and policy uncertainty around trade frameworks, arguing that after the rally the risk/reward looks less compelling at current levels even while raising its longer-dated earnings estimates in the same note.

Adding to the negative tone, market participants are also circulating a recent Form 4 disclosure showing an executive vice president sold 6,472 shares on May 1, 2026 at an average price of $226.50 (about $1.47 million). While insider sales can occur for many reasons, the timing near recent highs can amplify profit-taking when a stock is already under valuation scrutiny.