FORTUNE -- There is no shortage of theories why Apple (AAPL) -- already at a 453-day low Tuesday -- fell another $28.13 in mid-day trading Wednesday to touch $398.11, wiping out all of 2012's gains.
Among the reasons we've heard:
Apple's market value has now dropped $288 billion since last September, which is greater than the gross national product of all but 34 countries.
There is, however, an upside to a down day like this, if you care to see it that way.
Investors who have been waiting for Tim Cook to raise Apple's dividend can take comfort in the fact that the market has done it for them. At $398.11 a share, Apple's current dividend of $10.60 returns a yield of better than 2.66%.
Which these days, isn't bad.
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