I posted this list previously but I narrowed it more. You can track the bear market using the stock symbols below. Most of them are ultra-shorts.
EEV,FXP,SCO,SCC,SMN,SSG,DXD,BGZ,DEE,DOG,FXB,FXF,MZZ,PLW,PSQ,QID,REW,RWM,SDS,SH,SIJ,SKF,SKK,TZA, BND,DTO,DUG,DZZ,EFU,ERY,FAZ,MYY,SRS,TWM,SJH,