As far as I know, CSIdata has support fordelisted stocks. They make unique numeration for each stock.
There is HUGE survivolship bias for many trading strategies. It would be great, if Gary will add into QP database support for delisted stocks. --- In [email protected], jsch...@... wrote: > > > Of course, mergers, spinoffs and more ,,,,, > There are no databases that I know of that track this level of > detail, which is why there is a survivorship bias in the > market. > >
