.pk,.ob means pinksheet(otc, pennystock all that high risk stuff) the company was probably delisted from the big boards ...

I lean more towards trading than investing ..but if you were to buy a dividend paying stock please do consider buying after the company pays the dividends (10 - 20 days as i see on most charts) when the price dips and the uptrend starts again till the next dividend payment) and also consider splits in the history as well as the future