Is Nikko AM STI ETF and Singapore Airlines stock still worth to buy, knowing that Singapore stock has going bad?

If u feel that sia and Etf worth buying, go ahead and buy.
Price and value is different entity. Do your research and be better informed.
Is the current bad sg stock situation temporary or permanent?

You will want to buy when the stocks are low/cheap so not that bad an option to buy now yeah?

But of course, never know when is the lowest point of the curve so depends on your risk appetite as well. STI is abit more stable since it comprises of a basket of stocks. So if you have lower risk appetite, can consider ETFs. If u prefer more volatility, Singapore Airlines.

That being said, ETFs will probably recover faster since you won't expect all top stocks to stay low forever. Don't quote me, just my perspective on ETFs.