The Dollar has gotten stronger against the Yen $1 = 100 Yen again and I think Sony and Nintendo have to calculate their year end totals based on yen to other currency rates at the end of the month.
So if Q1 they make $100 at 80 Yen, its 8000 Yen
But if in Q2 they make another $100 at 100 Yen I think it goes to 20,000 Yen for the six months because the currency rate changed.
I base it on this:
http://www.nintendo.co.jp/ir/en/library/events/090130/02.html
The Yen seems to have gone something like this by quarter (dunno about Euros or Pounds):
105 to a dollar
100 to a dollar
90 to a dollar
100 to a dollar
But the current forecasts for Nintendo and Sony seem to be based on a 90 Yen = $1 forecast, and it looks like the reality now is 100 Yen = $1
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