USDRUB Delta Hedge Levels

Delta hedge step has grown last 3 days in USD/RUB options of the September '15 series. Now it is 1000 points. 3 days ago it was 500. An example of appropriate book (option position):
s12.postimg.org/nrvnhjaj1/20150821_01.png
deltahedgeoptionsUSD (US Dollar)

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