Every now and then you can find two stocks that should have consistent relative value yet they do not. In the past I have had success with trading this way and I consistently look for these to appear. There is one at the moment, or rather two, that fit the bill and are worth an investigation. These are EDE and TAS.
TAS is a major shareholder in EDE and at times the value of the EDE shares held by TAS exceeds the market cap of TAS. At times like this it is worth selling EDE and buying TAS. When the ratio changes it is possible to then sell the TAS and buy back into EDE with more EDE shares than originally held.
Remember it is market cap not share price that is the governing factor. It is also necessary to take brokerage and capital gains tax into account. Another factor to watch is the taxation angle where trading this way causes problems in how the tax department views these trades and an individuals income tax position.
Start by comparing the SP graphs. They show an amazing opportunity. Research the companies activities as well.