I just recently realized that I really don’t understand brokerage selection very well. In the past, I just opened an account casually, and I never thought commission fees could differ so much.

I checked the rankings of the major securities firms in Taiwan. Yuanta, KGI, and Fubon do indeed have the highest market share, but the differences in commission fee discounts are pretty big. For example, Yuanta and KGI are both 6 discounts, but E.SUN is only 2 discounts, Cathay is 2.8 discounts, and Uni-President uses a tiered system where the rates are adjusted based on the trading amount. If you buy 5 shares of TSMC the commission fee can differ by a few thousand NT dollars—so over a year, the savings really add up.

That said, what I’m more torn about now is whether brokers with low commissions have any stability issues—will their trading system be reliable? Is order execution fast? Also, are their margin interest rates and the availability of borrowable securities sufficient? These are all things you need to consider when choosing a broker. Large brokers usually do better on these details, but smaller brokers often lower commissions to attract customers.

If you only want to do regular periodic investing in Taiwan stocks, then the commission fee discount is definitely the top consideration. But if, like me, you sometimes want to use margin or short-sell, then you need to look at each broker’s margin interest rates and the availability of securities. At the moment, margin interest on Taiwan stocks is roughly in the range of 6%-7%. Larger brokers are usually cheaper.

I also found another issue: if you buy overseas stocks like US and Hong Kong stocks using local brokers, it’s usually handled through remittance, so the commissions tend to be higher. Some people just open overseas brokerage accounts directly, like Mitrade, Interactive Brokers, or Firstrade—each has its own pros and cons. Mitrade has a low threshold of just $50. Interactive Brokers is suitable for large funds, while Firstrade is a favorite among ETF investors.

It feels like there’s no absolute answer when it comes to choosing a brokerage. You still need to look at your own trading habits and the size of your capital. How do you choose? Have you ever run into any pitfalls?