Argan ( $AGX ) Shares Drop -27% in 30 Days as Valuation Concerns Mount (See the latest news for any ticker on Tickeron.) Argan (AGX) shares fell roughly 27% over the trailing 30 days, closing at $383.00 on September 17, 2026, down from about $528 a month earlier. The decline extends a multi-month correction: the stock has shed close to half its value from its mid-2026 highs after a sharp rally tied to AI-driven power demand. $PWR $FIX $MTZ $ECG $EME $MYRG $DY $LGN