Earlier quoted context omitted.
And the value of Fidelity's Apple stock would go down by $2.6 billion. The $100 billion in cash is currently factored into the share price. Dispurse the cash and the market will discount the share price to match. Personally I'm hoping for something more interesting than a special dividend. It does seem strange to have the announcement before the trading day begins though. I would think any big announcement would come…
Factoring cash into share prices is fine if you're in Econ 101 or you're Warren Buffet, but in practice stocks usually go up when they announce an increase in expectations in dividend payouts. At some point the market does not trust firms to manage their extra cash to line shareholders' pockets rather than their own, and beyond that point the market wants to see dividends paid out.
For example, look at the historical stock prices for Microsoft in 2004 when they issued a $3.08/share dividend: http://finance.yahoo.com/q/hp?s=MSFT&a=10&b=1&c=...
You can see that the difference between the close on Nov 12 and the open on Nov 15 is $2.63 where the difference in the surrounding days in about 20 times less.