One difference between ERTS and EBAY is that ERTS was already in the S&P400 index, so for some fund families they simply shifted the shares from the S&P400 fund to the S&P500 fund.
I don't think that completely explains it, though, because SDS was also a S&P400 memeber and it had a better finish.
I split money equally between EBAY and ERTS the last 15 minutes figuring at least one of them would spike. I lost some in ERTS, but struck gold with EBAY! Love those S&P500 adds.
Looking at the 'awesome' 2 pt move in EBAY at the close, makes you remember those crazy 15-20 point moves when other stocks got added to S&P500 in 1999 and 2000...
Fleance