Dear all, this was shared at another forum. I think it's very interesting, so I post it here as well.

Sometimes I share some nice topics from this forum to the other as well. Hope you all don't mind.
Lithium,
a full position means that I am fully load of a stock.
Normally, I will acquire $500,000 to $1,000,000 value for a small cap as a full position. For example, the AMVIG (2300) stock I have is 220,000 shares or about $770,000 which is about 3.37% of my total portfolio.
Sometimes, I buy about half position for a small cap. For example, I bought 30,000 shares of stock 773. It is a half load or a little bit below half position because there is some "problem" of the company. But I don't want to miss the chance to make money. The problem of 773 is that there is a conflict between the ex financial officer and the founder but I don't know who is correct. Therefore, I take half load.
A few small caps in my portfolio are in high loading. For example, I have 381,000 shares of stock 100 and the dollar amount is about $1.65 million or about 7.26% of the portfolio. I got the share at $1.62. Most of the money amount comes from the price rising of the stock 100.
Basically, the determination of the stock weighting in my portfolio is calculated basing on :
a. the earning(profit) potential of the company in the coming five years.
I always give up the short term growth companies. That means I don't buy short term growth companies.
b. The consistence of the past earning of the company.
c. The size of the company.
d. the market view of the company.
e. the market momentum.
f. my emotion at that moment.
It looks very complicated. In fact, during I read the annual report of the company, I already know how many shares and how much amount of money should I allocate to the stock. I weight the risk first and see how much I will lose in the stock. Most often, I don't calculate how much money I will make from the stock.
Stock weighting is very important in my trading. I don't want to see a stock rise 300% in 7 years but I own 10,000 shares of the stock.
Hope this can help.
marcuse