Gentlemen (I assume), Thank you for your responses. Ironically I have read a number of each of your previous replys to other issues and they have been beneficail to me, espeically a few from q.lurker. As I review the responses, yes CUSPIP has changed: NEW: Fund Ticker RSP CUSIP # 739371813 ISIN US7393718132OLD: Fund Ticker RSP CUSIP # 78355W106 ISIN ?? Can't locateI am left wondering if implementing either a 1) Corp Name Change or 2) Stock for Stock Acquisition, might potentially have an impact on historical prices, and in particular if I ever have to rebuild price history. One of the most significant uses of my inestment data in quicken is to look at portfolio value at various intervals to assess what strategies have had the most beneficial impact.WIth respect to NotACPA, "missing the issue. Why is any change necessary?" Quicken is prompting if the new secuirty name (PowerShares S&P 500 Equal Weigh Portfol) is a new security or it the old (RYDEX ETF TRUST GUG S&P500 EQ WT). I am not sure of implications, some noted above, of future impact on how to handle the transaction. Each brokerage has reported it as a slightly different transaction: TDAmeritrade: MANDATORY - EXCHANGE (78355W106)Fidelity: MERGER MER FROM 78355W106#REOR M0051119510001 POWERSHARES EXCHANGE TRADED FD TST S&P (RSP)