The last time FX brokers, still hurting from the Swiss National Bank’s revaluation shocker from last January which forced brand names such as FXCM to seek an urgent bailout, scramble to hike margins was in late June just ahead of the Greek “event risk” weekend, when numerous brokers either hiked margins on EUR positions or went to “close only” mode due to “uncertainty surrounding the Greek debt negotiations… that could lead to high volatility on the market.”