The T20 season is up and running, with the first week of an action-packed September delivering non-stop action in the Sixer Market! Right from India's historic win over England at the Kia Oval to Faf du Plessis' stunning return to form in the CPL, the Sixer Market also delivered in terms of fantasy stock opportunities. As we get into the thick of things for this week, a look into this week's Bulls and Bears is in order. Without further ado, here are this week's Bulls and Bears!Bull #1: Mark Adair (Ireland)Mark Adair, who made a comeback to the Irish T20I side, had a brilliant series against Zimbabwe. In an Irish side that boasts of Paul Stirling and Andy Balbirnie, it is tough for a player to steal the spotlight. But Adair did it with aplomb. The pacer picked a bucket load of wickets in just three games with a match score average of 91.53. This earned him an increase of 35.19%, the highest across the Sixer Market for a player. He was one of the more popular players in the Market during the week, and with his form and fantasy stock price reading at 60.00 Sixer Coins per share, Adair is one to watch out for in the Sixer Market.Bear #1: Rovman Powell (West Indies)Next up is Jamaica Tallawahs captain Rovman Powell! The right-hand batsman has struggled to get going in the CPL with a match score average of 17.99 only. This has resulted in a price decrease of 12.70%, which has now reduced his fantasy share price to 35.40 Sixer Coins. Although Powell has chipped in with the ball as well, his batting woes have taken a toll on the Tallawahs' fortunes, which has left them reeling in the middle of the table. His discomfort playing against quality spin is a cause for concern for Powell, who will be key in the middle overs. Whether or not he will come to terms with the nature of the pitch and the spinners in the opposition ranks is a question for fantasy shareholders pondering a trade w.r.t Rovman Powell at 35.40 Sixer Coins per Share.Bull #2: Faf du Plessis (South Africa)The second Bull of the Week is Faf du Plessis, who had a big week in terms of personal form and the Sixer Market! After a woeful start to his CPL 2021, Faf du Plessis turned the tide with an emphatic 120 against table-toppers St Kitts and Nevis Patriots to see a whopping +26.94% increase in his fantasy stock price. Although he couldn't follow it up with another big knock, Faf has announced his return to form in some style already. With his price hovering around the 55 Sixer Coins mark, fantasy shareholders might just be lining up to get hold of his fantasy shares in the Sixer Market!Bear #2: Shimron Hetmyer (West Indies)Last but not least is Shimron Hetmyer, who makes the cut as a Bear this week in the Sixer Market! The southpaw hasn't been in the best of forms in the CPL, and it showed yet again. Hetmyer could only muster a match score average of 30.12, with a price drop of 13% hampering his fantasy price in the process. Although Hetmyer is known for his aggression against spin, he hasn't been able to convert starts into big ones. But with his talent and experience bound to shine through, Hetmyer at 40.40 Sixer Coins per Share might just be a bargain in the Sixer Market!