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by treis 1973 days ago
Today it opened at $265, hit a high of $483 and dropped to a low of $112. At 2:00 pm it was $226, 2:05pm it was $431, and then came back down to $237 at 2:15pm. That sort of volatility is, I think, unprecedented which means the market makers don't have good risk models. So you're right that they could be cleaning up here with a large spread. But that profit comes at unknown levels of risk.