There are several articles and theories behind the recent bringing back of a kind of IBM pension that was dropped years ago.? This board has a mix of traditional Defined Benefit participants with the modified retiree health plan "annual credits", 2nd choicers with FHA, cash balance plan participants, also some plan participants got transferred to an insurance company based annuity, etc, etc...? I find it interesting how IBM will now use the over funding in the retirement plan to allow its fungible use of money elsewhere.? This article even notes the Kathi Cooper case: (hint - I often open links in incognito tabs thus some site's cookie counters believe I've not hit the paywall limit)
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Or in general just Google "IBM pension changes".