Summary:
A lot of people are betting that Redfin's price will go down, and some think it will go up. People who want to buy or sell shares can use options, which are like special contracts. There are two types of options, puts and calls. Puts let you sell something at a certain price, and calls let you buy something at a Read from source...

- The title "Spotlight on Redfin: Analyzing the Surge in Options Activity" is misleading and sensationalist. It implies that there was a significant increase in options trading volume for Redfin, which may not be the case after analyzing the data provided in the article.