http://www.mortgagenewsdaily.com/mortgage_rates/MBS-Abbreviations.aspxCC's (Current Coupons) - Basically it's whichever coupon in the FNMA 30 yr fixed stack that happens to be the most liquid or closest to par. Choppy - refers the the prices of MBS vacillating wildly (big differences between highs and lows and lotsenCommunityServer 2008 SP2 (Build: 31106.96)