UPDATE | If you had invested $10,000 with Amazon in 1997, you'd have $5M today

NEW YORK (AP) — Amazon, the internet goliath that revolutionized the way much of the world buys books, toilet paper and TVs, hit a new milestone Tuesday. Its stock surpassed the $1,000 mark for the first time.

That price put Amazon’s market value at about $478 billion, double that of the world’s biggest traditional retailer, Wal-Mart, and more than 15 times the size of Target. A $1,000 investment on Amazon’s first day of trading in 1997 would be worth more than $500,000 today.

Only four other U.S.-listed companies have shares trading above $1,000: online travel booking company Priceline Group Inc., homebuilder NVR Inc., pork producer and ocean transportation company Seaboard Corp. and the apostle of long-term investing, Warren Buffett, with his holding company Berkshire Hathaway Inc. But stock prices only tell a part of the story.