Tips: Are there international ETFs?
There are many, including regional funds such as European or Pacific Rim funds, as well as individual country funds in relatively well-developed economies. In each of these countries there is an established index of reasonably large and liquid stocks that allows this to happen. As developing nations stabilize their stock markets, they will no doubt adopt ETFs.
Naked options trading is very risky - many people lose money trading them. It is recommended contacting your broker or investment professional to find out about trading risk and margin requirements before getting involved into trading uncovered options.