S&P 500 Index
Asked on 11 Oct 2018
I believe bid offer spread is tighter for SPY, not to mention the trading volume is higher as well. For S27, minimum lot size is 10 shares, whereas you can opt to buy only 1 share of SPY. You can also trade options on SPY which can yield much better returns compared to buying and holding the ETF.
Yes, S27 has much lower trading volume. I don't see any reason why you should buy in SGX over US.