iShares Japan Fund (EWJ) is up 8 cents to $8.51 after the BOJ said it was buying $1 trillion yen ($111.5 billion) of shares held by financial institutions. The Nikkei didn’t do much, closing down .6 percent. However, options volume in EWJ jumped to 8 times the average daily levels the day before and February 9 calls saw open interest increase by 18,436. Looks like some investors were opening new positions in anticipation of short-term strength in EWJ.