One of the benefits of bear markets is that they often offer investors the opportunity to take shares of larger companies at prices that would otherwise not be available. Due to the weak market in December, we have such an opportunity today.

Two of the most dominant publicly traded companies are currently trading at around 20% lower than a few weeks ago. Read on to find out more about them and how you can use this situation to your advantage.

A little metal bull on a button on the keyboard labeled buy

Bear markets bring buying opportunities for bulls. Source of the image: Getty Images.

The juggernaut of e-commerce

Few companies give investors more ways to earn than (NASDAQ: AMZN)

The titan of technology dominates the online retail business in the United States and, increasingly, in many other parts of the world. Yet, despite years of torrid growth, e-commerce still accounts for only about 10% of total US retail sales. In addition, billions of people around the world do not yet have access to the Internet. In turn, Amazon's online sales business still has long-term growth ahead.

Incredibly, the company has built another company that could have an even higher profit potential in the long run than its e-commerce platform: Amazon Web Services. AWS is the leading cloud computing infrastructure platform in the world, with a share of about 50% of this rapidly growing market. According to a computer research company, the global market for cloud services is expected to exceed $ 278 billion by 2021 GartnerAWS should continue to fuel Amazon's growth for many years.

The success of its e-commerce and cloud business has allowed Amazon to grow in other fast-growing markets. He built a growing advertising business and is a leader in the growing smart device market. In addition, the company's acquisition of Whole Foods makes it a major force in the $ 640 billion US grocery sector.

Better yet, the recent market downturn has resulted in a decline in Amazon shares. Amazon shares are currently trading about 60 times more than Wall Street's earnings forecast for 2019. Although seemingly costly at first glance, it's a fairly reasonable price to pay for a business an elite that should grow. its profits to more than 42% per year over the next five years. Investors may want to use the recent sale of the stock as an opportunity to gain exposure in this incredible long-term growth story.

The king of research

We live in the era of information – and Google is where much of the world seeks the knowledge sought. But new investors may need to do their own research on the Internet to find out how to invest in Google because the technology giant has reorganized its corporate structure in 2015 to better reflect its wide range of business, by adopting the name Alphabet (NASDAQ: GOOGL) (NASDAQ: GOOG) for the parent company that owns Google and other entities.

Every search on Google's ubiquitous mobile websites and apps feeds more data into its powerful search engine. This data helps Google better target its ads, making them more relevant to users and more useful to marketers. As Google collects more data, it generates more money, which it can then use to improve its services, allowing more data to be collected, and so on. It's a virtuous cycle that has helped the company build one of the most powerful economic gaps ever created.

However, the ecosystem of Google extends well beyond research. More than 2 billion people use its Android mobile operating system, making it by far the most dominant mobile platform. Nearly 2 billion users watch over a billion hours of videos on YouTube each day. In addition, Gmail, Google Maps, Google Play Store, Chrome and Google Drive each serve more than one billion users.

Tech Titan is also aggressively investing in areas such as autonomous vehicles, healthcare, cloud computing and cybersecurity. The incredible profitability of Alphabet's research activities allows it to reinvest some of its abundant cash in "moonshots" – risky but potentially highly profitable efforts that can disrupt huge industries and even create new ones. In this way, an investment in Alphabet is accompanied by an additional asset: a venture capital technology fund, managed by some of the best minds in the industry, that has a proven track record in creating value .

Best of all, the Alphabet stock is currently down nearly 20% from the peaks of the past year. Equities can now be purchased about 22 times more than analysts' forecast earnings estimates for 2019 – a fair price for a dominant company whose earnings are expected to grow by more than 15% per year over the next five years. As such, investors might consider buying some of the king's socks of research today.

John Mackey, CEO of Whole Foods Market, an affiliate of Amazon, is a board member of The Motley Fool. Suzanne Frey, an executive member of Alphabet, is a board member of The Motley Fool. Joe Tenebruso has no position in the mentioned actions. The Motley Fool owns shares and recommends Alphabet (A Shares), Alphabet (C Shares) and Amazon. The Motley Fool recommends Gartner. Motley Fool has a disclosure policy.