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Ok, so if I'm reading your graph right, then powerup/powerdown was mostly "net neutral" during the past 30 days. Leaving unexplained where the other 10M Hive went. I suppose it could have all be Hive converted by stabilizer to HBD. But if we assume an average of 50K HBD worth of Hive bought per day by the stabilizer, that is less than 1.7M HBD per month (50K * 30 days = 1.65M HBD), and at a "profit rate of 1.20 USD/HBD", that would still only be 1.7*1.2 = 2M USD, which at a Hive price of .50 USD would only be 4M Hive converted. So I can't figure out where the other 6M Hive went...

[Edit] Hmm, I wonder if it could just be Hive still locked up in collateral from ongoing Hive->HBD conversions.

powerup/powerdown was mostly "net neutral" during the past 30 days

Correct.

I wonder if it could just be Hive still locked up in collateral

That's what I thought too.