ALHAF.PA Haffner Energy EURONEXT up 22.88% intraday (19 Mar 2026): volume surge signals trading shift

ALHAF.PA stock jumped 22.88% intraday on EURONEXT on 19 Mar 2026, trading at EUR 0.073 after opening at EUR 0.0645. Volume surged to 20,130,357 shares versus a 3-month average of 4,260,453, putting ALHAF.PA among today’s high volume movers in Europe. The move reflects short-term liquidity and speculative flows for Haffner Energy S.A., a French renewable utilities developer focused on carbon-negative hydrogen. We track price action, valuation metrics, and outlook to explain the intraday spike and what traders should watch next.