Officials briefed on the matter described water rights as a turning point that few analysts had penciled in even a quarter earlier, citing shifts in carbon markets and a recalibration of expectations across the ASEAN bloc.

Markets responded in measured fashion. Traders pointed to water rights as the principal catalyst, though strategists at three large banks cautioned that the underlying dynamics in carbon markets remain unsettled.

Behind the headline figures, a more nuanced picture is emerging. Practitioners closest to water rights say the conversation has quietly turned toward carbon markets, a shift that would have been unthinkable as recently as last winter.

Critics argue the response has been too cautious. Supporters counter that any move on water rights must be weighed against the still-fragile recovery in carbon markets, particularly across the ASEAN bloc.

The longer arc is harder to read. For now, water rights appears to be reshaping the calculus around carbon markets, and few of the people interviewed for this piece expected that recalibration to reverse before year-end.