Not yet, but will start to do so if my allocation drifts more than 10% (mainly due to equity losses). I try to keep cash / bonds allocation around 20% (I'm 42), but I'm also still contributing to my 401k and IRAs (which are predominantly equities since the time horizon is long). I get a cash bonus in March, so that could trigger buying more equities via DCA into my after tax equity accounts (add to dividend stocks and other diversification like REIT and international funds). If I get laid off, I'll have a severance to help bring cash and bond allocation to my FIRE target of 30%. Otherwise I'll switch to 30% bond allocation at age 50 (so I might let it drift up anyways).
Sorry this doesn't seem very informative, now that I've written it out, but it was a nice reminder to have a look at my net worth spreadsheet and update all of my balances. I've lost about 4% since the beginning of the year, so AA hasn't changed much.