Apples first company of $ 800 billion
Apple has become worth $ 800 billion.
The rise in value on the stock market was caused when super investor Warren Buffett doubled his interest in Apple.
Ondak's cash stock of $ 250 billion, Apple goes to the market of investors to borrow money. The group also issues bonds, including paying investors a dividend.
The cash stock holds Apple to make major acquisitions and invest in new technology.
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