Yes Puzzleman, that margin increase coming on the heels of the selloff is pretty obvious. Illegal, collusive, immoral are the only 3 words of many I started to write to describe it that passed the vulgarity test. Long run it doesn't matter, because we are headed to all-cash (zero margin) markets.
Think of the chart painters/bullion banks/CME et al as Ultimate Fighters who jump on a downed opponent to destroy him. Only in our case there are no referees to step in.
Strike