While Regeneron (NASDAQ:REGN) doesn't rank among top performers in the Nasdaq Composite, its year-to-date performance is still nothing short of impressive. Shares have risen around 180% and boosted the company's market capitalization to nearly $15 billion on the strength of Eylea, the company's flagship drug targeting age-related macular degeneration. The company reports earnings Wednesday, and as is the case for many high flying-stocks, hitting Wall Street's revenue estimates and offering strong guidance for the future will play a vital role in which direction the shares go.

In the following video, health care bureau chief Brenton Flynn outlines the competitive environment for Regeneron's Eylea, including one low-priced drug that could turn out to be its biggest competition.

Brenton Flynn has no positions in the stocks mentioned above. The Motley Fool has no positions in the stocks mentioned above. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.