Is the commodity boom over?

I took a look at my portfolio as was not happy with what I saw. Despite a strong run up on the Straits Times Index to close to 3,500, my stocks have not been moving likewise, particularly Noble Group and Wilmar International, which are down more than 10 per cent since I bought. My urge to sell stocks in the commodity sector is driven by the negative academic readings on the sector as a result of me preparing for my school essay. I guess the commodity super cycle has to end some where than continue in perpetuity. Perhaps I will also sell those stocks which are worth less than SGD 3,000 in total, to make the portfolio efficient. But I will have to come back to the issue of what stock I should buy, and this perplexes me a lot. Stay tuned.