Shame on me. I hadn't actually looked at the rest of the market data. I came across that figure while researching how many shares Microsoft had in Facebook from

Shame on me. I hadn't actually looked at the rest of the market data. I came across that figure while researching how many shares Microsoft had in Facebook from a "Related Links" box. Even if I had, I still shouldn't have repeated the speculation of the cause. Maybe the announcement stopped the share value sliding by 14%. I was already aware that one of the great fallacies of market reporting is News Item X caused change in Share Price Y.