ความคิดเห็นที่ 13
I just want to share my thought about filter rule.
Effectiveness of the filter rule
- The rule may generate the profits. If the transaction cost is a fixed dollar amount per transaction, the rule may generate profit to the investor who trades a large volume per transaction. Basically, the return to the investor depends partly on the level of transaction cost.
Ineffectiveness of the filter rule
- The rule is outdated. According to Zaima, the past never guarantees the future. Filter rule is created from analyzing the historical price trends of a security. Evidence has suggested that filter rules are rarely successful in making profits for the investors.
- The rule requires frequent short term trading. Investors have to buy or sell every times the stock price decreases or increases at an X% filter.
- The return can be wiped out by the transaction cost. Although this strategy may earn excess return prior to transaction costs, adjusting for the transaction costs can wipe out the excess return.
- The rule requires lots of time-consuming. Without specific financial software, it is time-consuming to keep watching the movement of the stock price all day.
- The rule conflicts with the efficient market theory. If the market is efficient, the stock price is fully reflected by all available information. There is no way that the investors can take the advantage from the past information in forecasting expected future prices to make extra profit.
- The rule yields the poor result. If you compare filter rule strategy with the buy-and-hold strategy, you will see that most of time filter rule strategy generates lower return than the latter strategy after the transaction cost.
- The rule doesnt provide the consistence results for the different stocks with the same filter and vice versa.
จากคุณ :
Antonio_Bellagio
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28 ก.ย. 48 16:55:08
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