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This article was updated on August 4, 2017, and originally published on Sept. 16, 2016.

Whether you're just starting to learn how to invest or have been reaping the rewards of the stock market for decades, there's a financial podcast out there for you. Podcasts are perfect for fine-tuning your investing skills. You can listen to them while commuting, doing household chores, or walking your dog.

And the best part? They're totally free.

The best investing podcasts range in topics from personal finance and investment planning to stock market updates and niche investment ideas. To find the best investing podcast for you, start by deciding what exactly you want to learn.

If you're interested in "investing" as a broad economic concept, then NPR's Planet Money may suit your fancy. Planet Money discusses the incentives and behaviors that drive many everyday transactions and interactions. Podcasts like these can help investors analyze global macroeconomic trends, and any NPR podcast will be both riveting and polished.

Or, if you're looking for more stock-specific content, The Motley Fool's MarketFoolery will update you daily on the biggest stock market news, with top-tier investors analyzing the big headlines and giving investment recommendations. Industry Focus, also from The Motley Fool, goes a bit deeper, diving into a different sector of the stock market every day. Listeners will get the sense that they're a fly on the wall, snooping on a conversation between smart, well-informed investors.

In the interest of transparency, I have to disclose that not only do I work for The Motley Fool, but I am also the host of the Wednesday healthcare edition of Industry Focus. So I'm naturally predisposed to think that it's the best investing podcast out there. However, biases aside, I stand by my claim that Industry Focus and the other Motley Fool podcast will help you beef up your investing chops -- whether you're just getting started or you're a master investor. And I'm not suggesting you stop there: Plenty of other outlets offer outstanding personal-finance and investing podcasts.

If you're looking to learn how to invest, dive deep into niche sectors of the stock market, or get financial planning advice, there's a podcast for you. Here's a chart of the best investment podcasts out there:

Name Frequency Length Premise Producer Why You Should Listen
Planet Money Semi-weekly 20 minutes Economics of the real world NPR Satisfies your intellectual curiosity like none other
Motley Fool Money Weekly 40 minutes Top business and investing stories TMF Your weekly financial digest, all in under an hour
Market Foolery Daily 20 minutes Stock market news TMF Legendary host and premium analysts
Money for the Rest of Us Weekly 30 minutes Personal finance with a hint of philosophy Independent Outside-the-box lessons on how stocks and the economy work together
Industry Focus Daily 25 minutes Industry deep dives TMF Sector-specific expertise
Motley Fool Answers Weekly 30 minutes Personal-finance questions answered TMF Hilarious banter amid top-notch advice for a healthier, wealthier life
Rule Breaker Investing Weekly 25 minutes Learn to invest TMF One of the world's greatest investors teaches you his secret sauce
Freakonomics Weekly 45 minutes The hidden side of everything WNYC Studios What you wish Econ 101 had been

Check out any of these great investing podcasts on iTunes or through podcast apps such as Overcast or Stitcher. You can also find any of The Motley Fool's podcasts at fool.com/podcasts.