Investing in turnaround stocks can be difficult, often doesn't work out, and sometimes the stock has the potential to go to zero. But when they do work out, they can generate absolutely massive gains.

The rhesus factor, or Rh factor, is a protein that may be present on the surface of red blood cells (RBCs). If RBCs contain the Rh antigen, they are Rh-positive, and if not, they are Rh-negative. It ...