When it comes to investing, Market Exposure is everything. It's the proportion of your assets that are tied up in a class of securities, a particular industry, or even a geographic market. And while market exposure can be subdivided in various ways to get a better understanding of the risks involved, at the end of the day it all comes down to how much you're willing to risk.So what does this all mean for you? Well, if you're looking to diversify your portfolio and reduce your overall risk, then you'll want to make sure that your market exposure is spread out as evenly as possible. However, if you're more comfortable with taking on some extra risk in exchange for potentially higher returns, then concentrating your investments in just a few areas may be right for you.