Phin, Andrew , Prono, Todd Andrew , Reeves, Jonathan J. and Saxena, Konark. "Level Shifts in Beta, Spurious Abnormal Returns and the Tarp Announcement, 2018-081," Finance and Economics Discussion Series (November 2018). https://fraser.stlouisfed.org/title/1491/item/724100, accessed on May 9, 2026.