December series has two crucial events one is State election results which will be declared on 9 Dec and 18 Dec RBI policy. From Historical Data only 3 Years ie 2000,2001 and 2011 has given negative returns highest being 4.3% in December month rest 10 years have been positive 0.4-4% so except positive closing on December series. I am slightly bullish and expect expiry between 6100 and 6300. I will modify the strategy as we go if required by adding selling calls or puts.