[x5452]

Yes of course bcause every IRA and 401K allows shorting and trading on margin.

[oldcomputerguy]

"Yes of course because every IRA and 401K allows shorting and trading on margin."

No, but they have MM accounts that serve much the same purpose.
I will admit that 401ks are best moved to IRAs as soon as possible and in all cases of job changes. Shorting in IRAs however is quite easy, there a number of bear market funds that work quite well.