BTH has been testing my patience, but its finally back to what...

BTH has been testing my patience, but its finally back to what we paid in the CR, which I regretted participating in.  Thankfully I also topped up at 27c after that.  The SP went up to about 38c a few days prior to the CR closing, which is what I have also noticed with quite a few other stocks, only to start its descent to below the CR price almost immediately after the CR.  Does anyone know of companies or brokers actively manipulate the SP before a retail CR closes in an effort to encourage holders to participate if it looks like the take up might be disappointing? It just seems to happen too often to be a coincidence.