億豐窗簾股價最高漲到408元,
盈再表算的貴價僅260元,
同學據此質疑盈再表不準?
Nien Made's share price increased to NT$408, but according to On's calculations, the fair price should be only NT$260. Based on this, a student questioned the accuracy of On's analysis.

盈再表算的貴淑價,並非在抓股價高低點,
貴價不是最高價,便宜價亦非最低價。
股價漲到接近貴、剛好貴、非常貴都有可能,
漲到非常貴不代表盈再表貴價就算錯。
所以到了貴淑價之後何時該賣或買?
不可知也無標準答案,
請自己決定,別再問了。
The pricey and cheap prices calculated by On's table are not meant to identify the high and low points of stock prices. A pricey price is not necessarily the highest, and a cheap price is not necessarily the lowest. The stock price may rise to a level that is close to pricey, just hitting the pricey mark, or even reaching an extremely expensive level. However, reaching an extremely expensive level does not mean that On's table's pricey price calculation is incorrect.
So, when should one decide to sell or buy after reaching the pricey or cheap price? It is unknowable, and there is no standard answer. Please make your own decision and refrain from asking further questions.

很多事件的發生並非絕對,而是機率高低,
像「人性本善」這句話對不對?
大家不會單純答:對或錯,
而是「7成對,3成不對」,
這才是答案。
The occurrence of many events is not absolute but rather a matter of probability. Is the statement "Human nature is inherently good" correct? People won't simply answer "yes" or "no," but rather "70% correct, 30% incorrect"—that's the answer.
70%股票在淑貴價之間波動,
5%股票貴了還會更貴,
請問如何操作最好?
A. 遵守淑買貴賣
B. 貴了也不賣
70% of stock fluctuations occur between cheap and pricey prices, and 5% of stocks that are already expensive can become even more expensive. What is the best approach?
A. Follow the strategy of buying cheap and selling pricey.
B. Do not sell even when the stocks are expensive.
答案是A
Bloomberg做過這項統計,由底下圖可知,
1954-2014美股報酬率落於0-15%之間,
可見盈再表訂的貴淑價相當合適,
便宜價預期報酬率15%,本益比12倍,
貴價預期報酬率0%,本益比30倍。
The answer is A.
Bloomberg has conducted this analysis, as shown in the figure below. The study of U.S. stock returns between 1954 and 2014 indicates that the "pricey" and "cheap" prices established by On's table are quite suitable. The expected return for "pricey" prices is 0%, with a PER of 30 times, while the expected return for "cheap" prices is 15%, with a PER of 12 times.
再看Bloomberg的圖,
買的本益比越低報酬率越高
反之買的本益比高則報酬率低,
故得證:淑買貴賣,績效會最好
Upon closer examination of Bloomberg's analysis, it is evident that the lower the PER, the higher the expected return. Conversely, a high PER corresponds to a low rate of return. This supports the idea that a "buy cheap and sell pricey" strategy is likely to yield the best results.

股票由便宜到貴或貴到便宜的時間很長
往往長達5-6年甚至10幾年
人的眼光又看不了太遠
中碳在2009年之後才漲上來,
之前好幾年一直在便宜價以下,
同學一直在問中碳怎麼都不會變貴?
2014年漲到200元同學又問怎麼都不便宜?
The time it takes for a stock to go from cheap to expensive or from expensive to cheap is very long, often lasting 5-6 years or even more than a decade.
People’s vision can’t see that far ahead.
For example, China Steel Chemical only started rising after 2009, but for several years before that, it remained below a cheap price.
Students frequently asked why China Steel Chemical wasn’t getting expensive.
Then in 2014, when it climbed to NT$200, they began asking why it wasn’t getting cheaper.

股票在高點時通常並無異狀仍然相當看好,
然而股價上漲不代表可以無限追高。
EL股價從2021年12月370元跌到25年87元,
崩掉76%,仍然不便宜
MRK股價2024年131元跌到25年89元,
大跌32%,還是貴
只有在貴的時候賣掉才能免於套牢的悲劇
按盈再表,太貴的股票不能買!
When a stock is at its peak, it usually shows no abnormalities and is still considered promising.
However, a rising stock price does not mean it can be chased indefinitely.
EL’s stock price dropped from $370 in December 2021 to $87 in 2025, a collapse of 76%, yet it is still not cheap.
MRK’s stock price fell from $131 in 2024 to $89 in 2025, a sharp 32% decline, yet it remains expensive.
Only by selling when a stock is overpriced can one avoid the tragedy of being trapped in a losing position.
Stock purchases should be based on On's table—overpriced stocks should not be bought !
