Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Highest market cap for a company from historical data
Everything would depend on whether the calculation is being done using the company's all-time high intraday trading price or all-time high closing price. Further, I've seen calculations using non-public pricing data, such as bid-offer numbers from market makers, although this wouldn't be kosher. The likelihood is that you're seeing numbers that were calculated using different points in time. For the record, I think Apple has overtaken Microsoft's all-time highest market cap with a figure somewhere north of $700 billion (nominal).  Here's an interesting article link on the subject of highest-ever valuations: comparison of highest market caps ever