Market capitalization represents the total market value of a publicly traded company. It's the simplest way to measure a company's size.
How to Calculate
Market Cap = Share Price × Total Shares Outstanding
For example, if TSMC (2330.TW) has 25.9 billion shares at NT$600 each, its market cap is roughly NT$15.5 trillion (~$500 billion USD).
Size Categories
| Category | Market Cap |
| Mega Cap | >$200B |
| Large Cap | $10B-$200B |
| Mid Cap | $2B-$10B |
| Small Cap | $300M-$2B |
| Micro Cap | <$300M |
Largest Asian Companies by Market Cap
TSMC, Samsung Electronics, Tencent, and Toyota consistently rank among Asia's largest companies. Market cap shifts daily with stock prices.
Why It Matters
Market cap determines index weighting — larger companies have more influence on indices like the Nikkei 225 or SENSEX. It also affects liquidity and institutional investment eligibility.