My preference would have been to put 'na' since I just want to illustrate a portfolio with STI ETF and some satellite holdings. But SGX Cafe wants me to put in a buying price. So instead of estimating, I changed it to '0' since 'Not Applicable' is not allowed. Since my estimate of about $5 for OCBC has caused a disturbance in the force. If '$0' causes problems, I will estimate $100 buying price and be the biggest loser in sgxcafe? Thats ok with me. I'm here to give advice, not to win investing competition.
I prefer not to have too much of an awareness of buying price - dwelling too much on purchase prices from long ago may result in "sunk cost fallacy" when making buy/sell decision. When investing, psychology is important and you need to have the right numbers in your head. One should sell when the stock is overvalued, the buying price is not so important.
But I appreciate the discussion and notice increased pageviews to the blog due to Felix's post. (blog is advertising free - I started it as an experiment only).
I also noticed that Dividendknight posted a comment in sgxcafe - he is 100% spot on. The portfolio illustrates core-satellite strategy.
Thanks