I thought this might have been a euphemism for GBP selling
But, no.
It really is flood gates ... North Korea Opens Floodgates at Dam Near Border With South
- North Korea released water from a dam near its border with South Korea without warning
- Raising fears of flooding in the South amid torrential rain in recent days
- North Korea appears to have gradually opened the floodgates at around 6 a.m. Wednesday, Yonhap News reported
Bloomberg for more at that link, above
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Rates update :