What are the companies that I can invest in?

At first it might sound lika a hoax but since this is Singapore where possibilities are limitless. There is a company called Circles.Life that offers a free sim only plan. Their plan includes 1GB of data, 30min talk time and 10 SMS every month for S$0. This is perfect for someone who just needs a sim card for emergency purposes or someone who needs a line so they can be reached but does not use their phone much. TPG also offers one which includes 2G of data/day but you can;t use it for calls and SMS.

Your interpretations are correct but we can look deeper into its characteristics. A bond has a face value which is the amount the bond will be worth at maturity and the amount the bond issuer uses when calculating interest payments. A bond has a coupon rate which is similar to interest rates. A bond shouls always have a maturity date which is self explanatory. Probobly the most important characteristic is the issue price which is the original price the issuer sells the bond.

Mate I don’t think you need not worry about how it will benefit you just as long as that trading business of yours is still working but I don’t think It would be still ideal to keep holding onto it since it doesn't have its benefits, you will mainly have to liquidate your business if you choose to give up on that business, Cheers!

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If you got scammed online, you can contact the authorities to help you out. Always background check on what investments your gonna go through. You can easily contact people across the globe with the use of internet. Always check their status before involving within them. But as much as possible get help with the authorites.

Just like in any country, there aren't many investments that guarantee your principal as well as returns in Singapore but of those that do, you should be very careful of scams. One other thing to understand is that when you get to enjoy such safety in your investments and visibility in your cashflows, you need to be prepared to accept a rate of return that is close to the risk-free rate. Your first bet is to invest on Singapore Government Treasury bills and/or Singapore Government Bonds. You can also try investing on saving plans or fixed deposits but the returns are low. If you want higher returns then you really need to invest on high risk investments.