I was doing some research and came across two stock tickers with the same name eseentially, and the tickers are MDCN and MDCND. I'm not sure what each of these means and how this works within the financial realm? Also, which should I track, or should I examine both?
The "D" suffix is designated for stocks that are going through a corporate reorganization and is typically applied for those stocks that is about to or just has undergone a reverse split.
It typically lasts about 20 trading days (almost a calendar month).
In the case of MDCN (Medican Enterprises) is traded as MDCND for the period 20150418 until 20150514. On 20150515 it reverted back to MDCN. It had a 10:1 reverse split with exdate 20150420.
Regarding multiple tickers - a ticker is just a point-in-time identifier. This company has had many tickers across its lifetime: TCXC TCXB TCXBD MDCN MDCND and possible XCAL and XCALE.
The 5th letter suffix is detailed here: http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/nasdaqfifthcharactersuffixlist.pdf