Michael Purves says the market's V-shaped recovery off April lows "confounded" him. Even though the SPX is inching back toward its all-time high, he sees the index just as easily falling back below 5,000 if earnings growth doesn't meet Wall Street estimates. That said, Michael expects that dip to be a buying opportunity. He also analyzes moves in treasuries and the U.S. dollar and why their correlation isn't binary like many investors believe.