No investments are "fully" passive, but some are more passive than others. For equities, the Dividend Aristocrats (those companies that have paid an increasing

No investments are "fully" passive, but some are more passive than others. For equities, the Dividend Aristocrats (those companies that have paid an increasing dividend for 25 years or more) are pretty close, and also are somewhat lower risk than equities in general (lower beta). The traditional passive income investments are bonds, and with as little as $6000 you could create a bond portfolio of US government debt that pays a monthly coupon (each individual bond is $1000 and pays interest every 6 months, so with 6 you get monthly income until the bonds start to mature). Unfortunately, interest rates are so low right now that you probably won't get the sort of income you are looking for even with the longest duration government bonds. Anything that is not as standardized and well-organized as the stock or bond markets is going to require more work and thus is less passive, or will result in you having to pay others to do the work on your behalf (thus leaving you with less income).