Market Capitalization: Apple v. Wal-Mart, Microsoft

Apple's (AAPL) market capitalization (~$218.2 billion today) has been higher than Wal-Mart's (~$191.5 billion) for about the last three months (see chart above), which is especially interesting considering that Apple's market cap was less than $10 billion in late 2003 when Wal-Mart's value was almost $200 billion. 

Apple hasn't quite caught up yet to Microsoft's market capitalization, but it's getting pretty close - they're only about $15 billion apart now; $233.3 billion for Microsoft vs. $218.2 billion for Apple (see chart below).