US Natural Gas Fund (UNG) rallied up to $16.26 per share Tuesday morning and was recently up 17 cents to $15.88. Natural gas rallied 32 cents to $4.18 Monday and is gained 4 cents to $4.22. In the options market, players have been showing a lot of interest in UNG calls recently and the action continues Tuesday. 57,000 traded, compared to 31,000 puts. The top trades include 5000 July 15 – Oct 18 call spreads on the ISE, which appear to be a roll of a bullish position from one month to the next.