2 Stocks I Bought While the Market Was Falling -- and Why They're Still Great Buys

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First, thanks are in order.

Thanks to all those who frantically sold stocks over the last week or so. It added to the overall stock market pullback. And that gave me a chance to buy two great stocks at a better bargain price than I otherwise would have.

Yes, while the market was falling, I was buying. In particular, I was scooping up shares of MongoDB (NASDAQ: MDB) and Teladoc Health (NYSE: TDOC). Here's why these two stocks were at the top of my list to buy on sale, and why they're still great picks no matter what the market does next.

Hand holding a blue market with drawing of a clock with "time to buy" written on it
Hand holding a blue market with drawing of a clock with "time to buy" written on it

Image source: Getty Images.

Disrupting the database world

I wrote last month that if I could buy only one stock to add to my portfolio, it would be MongoDB. Now I've put my money where my mouth is -- or at least was.

To understand why I like MongoDB so much, we need to get a picture of the current database market. The major databases built by market leaders like Oracle and Microsoft were designed decades ago. Back then, the world of data was a structured one where everything could be neatly arranged in rows and columns, as in a spreadsheet.

When these market-leading databases were initially developed, the cloud was something you looked up in the sky to see and not a far-flung network of remote servers hosted on the internet. If a company needed a database, it stuck a server in a room in one of its offices.

As the world changed, the major companies tried to change their databases, too. But it's kind of like adding a second floor to your one-story house: It can be done, but it's a lot easier and cleaner to just build a new house. MongoDB did the equivalent of building a new two-story house.

MongoDB was founded by the same team that started leading internet advertising company DoubleClick, which was acquired by Alphabet (then known as Google) in 2007. This team personally experienced the hassles of trying to use current databases to meet the demands of the 21st century. So after selling DoubleClick, they set out to build a database that was ideal for handling both structured and unstructured data and could store it anywhere -- locally or in the cloud.

The company is growing like crazy, with revenue over the last three years increasing by a 58% compound annual growth rate (CAGR). And MongoDB's revenue is the kind investors should love: recurring revenue based on a subscription model. Disrupting the database world has paid off well for MongoDB so far.

A new kind of physician house call

Meanwhile, Teladoc is disrupting an entirely different market. The company ranks as the largest provider of virtual healthcare services in the world.