You cant compare the two. Your only paying 2x current revenue on amazon. $180 a share revenue on a $300 stock is different then a stock at 3.30 with only .34 cents a share revenue and losing money badly. plug is 10x current revenue and cant even make gross profit let alone net income.
Funny thing is, amazon has made money in the past while plug has never.
Also book value is based on total equity. amazon doesn't really have a bunch of assets. That's why it has a low book value. It pretty easy to see why amazon is in much better position the plug.
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