I thought this shit would never die.
"Value Informed Indexing" was invented by two guys, Rob Bennett and John Russell. Anyway, the idea was that if the stock market is highly valued you back off you stock allocation and stir in bonds, and if it is lowly valued, you exit bonds and amp up your stock allocation.
That sounds reasonable enough, right?
But they never came up with a way you actually implement this strategy in real life. They claimed you are supposed to do it, but there were never any details, and you were a heretic if you expressed skepticism. This problem was compounded by the fact that Rob Bennett is literally crazy. Like full-on coo-coo for Coco-Puffs crazy. He would always start off sounding reasonable, friendly, and personable and then go completely Chem-Trails nutso. Bennett came up with all this stuff on Motely Fool, but got a lifetime ban. So he moved to Morning Star, got a lifetime ban, moved to Early-Retirement got banned, moved to Bogleheads got a lifetime ban. And probably a few others I don't know about. Bennett felt there was a buy and hold conspiracy that had been holding down his great ideas.
He also had this weird fixation with celebrity financial gurus. He struck up a correspondence with Wade Pfau along the lines of "starting valuations matter for retirement, and that's not being looked at." Which is true, but then went completely off the rails claiming credit for Pfau's work, etc. All this is on Bennett's website, by the way.
But where it get really weird is John Bogle. The king of buy and hold conspiracy was John Bogle, so Bennett had plans to confront him at a Bogleheads convention and out him as the impostor and enemy of the investor that Bogle represents. I think that might be why he got banned. :)
Long story short, yes I've looked into it. Unless you are bipolar, don't look into it yourself.