Shortable ETF's

Why are some major leveraged ETF’s like UPRO, SPXU and SQQQ shortable but TQQQ is not? TQQQ is just as widely traded as the others so I’d imagine it would be a good candidate for a shortable asset. Is there another reason why it wouldn’t be shortable?

Hey Beauj34, You can effectively “short” TQQQ by purchasing SQQQ. If you look at the graphs they are inverse, and move in opposite directions as QQQ changes. That’s how I play these, lots of intra day movement

Yeah thats exactly what I do as a work around but its just wierd that all the other proshare major ETF’s are shortable but TQQQ is not