To summarize, yes, a stock can lose its entire value. However, depending on the investor's position, the drop to worthlessness can be either good (short positions) or bad (long positions).
Is sino a good stock to buy?
SINO has a Quality Grade of D, ranking ahead of 6.07% of graded US stocks. SINO's asset turnover comes in at 0.159 -- ranking 115th of 137 Transportation stocks.