On Nasdaq, its 2 trades at 595,XXX each and I'm guessing its simply settlement from trades made earlier in the day. It'd skew AH's when volume is very small if it was a typical order. Volume has been pretty light lately so highly doubt it was the share buyback. Bring up a chart of Yahoo and you'll see massive spikes occurred in November, February and early March, those are the times Yahoo bought heavily IMO. Each of those spikes were 6 days in-a-row of gains.
First three trading days in March the average volume was 31 million shares (3/1, 3/4, & 3/5). For the rest of the days in March, average volume has been a pi$$poor half of that. The downside seems to be limite with the bottom around here at $22.
Your wrong. Yahoo execs have been picking their spots to buy and it has been on weakness. They are not buying on up days. So in effect they have been keeping it from sinking further. But in my opinion the stock is likely to crater really soon as Yahoo may want to wait until 19 level to add more. The Cypress situation is much more dire than is being let on.