[cloakandswagger]

I think you're underestimating just how big a deal the split was. It could have lead to Bitcoin being split into two distinct currencies, and this was happening on a very short and defined timeline (July 21st and August).

The swings absolutely were caused by anxiety/relief around this event.

[revmoo]

Not a chance. The volatility surrounding this event was at or below the normal levels of BTC volatility.