Home $weet home ... or financial folly

There are tempting ways to use your home for potential financial gain. The line isn't always bright, but there are some guidelines for when such moves can be smart ... or dopey.

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Smart mortgage move
When taking an ARM makes good sense
Adjustable-rate mortgages (ARMs) give you a fixed rate for a period of time (from one month to 10 years). After that, the rate adjusts according to the ARM's underlying index plus some margin. ARMs typically carry lower introductory rates than 30-year and 15-year fixed-rate mortgages.

Here's when the move can be smart:

If you're not planning to stay in your house more than five to seven years -- maybe you relocate every few years for your job or you're buying a starter home before having kids - an ARM can offer you a better rate (and more cost savings) than a 30-year fixed-rate mortgage.

Taking an ARM also may be smart if buying a home makes good financial sense for you and there's a big spread between the 30-year loan rate and the ARM rate, especially in a high-rate environment since it's more likely rates will fall in the future when your ARM resets or you choose to refinance.

(Here's when it's not a great idea.)

Prepay mortgage? Yup

Prepay mortgage? Nope

Tap equity? Yup

Tap equity? Nope

Renovate? Yup

Renovate? Nope

Get an ARM? Yup

Get an ARM? Nope
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Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer.

Morningstar: © 2014 Morningstar, Inc. All Rights Reserved.

Factset: FactSet Research Systems Inc. 2014. All rights reserved.

Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved.

Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor’s Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2014 and/or its affiliates.