What is the best way to invest your money over an 18 month span too gain the most???

If you need the money in 18 months, stay away from the stock market. You need to go with CDs or a high-interest saving account, such as the INGdirect account.

18 months is too short an horizon for the stock market; even with mutual funds, there is a possibility over that time period that you will end up losing capital.

Look to stocks for 5 year or longer investments.

if u actually have a chunk of money to invest u should look into being a private lender for someone who invest in real estate.. they can offer anywhere from 12-15% interest for your money. there is no risk to this Report It

There is alway risk involved when trying to investing your money.

I would suggest that you explore further into internet business. As the customer is world wide and the investment cost is rather low, the chances of success will be higher. With current technology, the process could also be made automated. With a proper system setup and correct web marketing strategies, you could easily earn some reliable passive incomes.

There are a lot of internet business models you could consider of (e.g. buying and selling domain names, affiliate marketing, auctions, selling digital or physical products, creating paid newsletter or websites and many more).

With a proper system setup and correct web marketing strategies, you could start to earn some passive income.

Find out more from below link. It will tell you how to setup a successful online business step by step. It will also tell you what are the reason behind each step, how you could go about doing it and where you could get the necessary resources free or at a low price.

Hope that it will be helpful to you.

Your time horizon is not very long. Therefore, your options are limited. IMO, your best two options are going to be bank CDs or a money market account. Stocks and bonds are not appropriate for this time frame. Unfortunately, your money will not "gain" very much.