Average in over the next several months if you are unsure. Strength this has shown in light of overall market downturn, I would go all in in now. Their may be a dip when next placement of common shares is announced, but chances are the stock will be higher when that happens.
If you look at the SPPR graph for the last three month, the only major pullback has been during the February 'subprime meltdown.' After the meltdown, SPPR has recovered avery rapidly and moved to new high ground. Management has been acquiring new properties and apparently turning them around to add to the bottom line. The dividend continues to increase. It is always hard to 'buy at the top.' However, the current top in SPPR may be the new bottom as long as the company continues to expand. JMHO.