Jeff Kantner said: (emphasis added) 'Corporate Acquisition' did what is probably best: generated one Remove and 29 Add transactions, each with the Date Acquired field set to the corresponding share count, down to decimals. (As a mutual fund, it has been getting quarterly dividends reinvested for some time.) I don't know how the brokerage firms handle this internally (they coded this as one Sell/Buy pair on the download), but absent a slicker way to retain the holding history in Quicken, this is probably the best (only) way to retain the dates for what amount to 'lots' of a fund. Thanks for the tip.
Jeff Kantner said: It's a Guiness Atkinson fund, and within its Info Statement on this I just found this statement: "each Conversion is structured to qualify as tax-free for U.S. federal income tax purposes. For some shareholders, there could be a small cash payment for fractional shares, and that could be taxable" The Positions page at the brokerage (Fidelity) now shows the holding under the new symbol, with all 29 'lots' carrying their original acquisition dates. Thank you all for your input.