Historically interest rates and the stock market rise together. So the ETF:TBF being a single bear 20 year Bond should track the stock market basically. But with the unusual interest rate policy being kept at extreme lows due to a continued weak economy every positive economic news story traders selloff bonds and each bearish economic news story they buy bonds. With the economic world a complete basket case every news story will see this and other Bond related markets jump up and down. The choppiness of the bond charts display this reality but with a bias to the downside. Better odds at the casino really. Even Gold which is viewed as a safe haven is not performing normally and is questionable at this point.