I thought oil would be my superhero today, considering how things started, but it turns out my ProShares UltraShort 20+ Year Treasury (ARCA:TBT) short was actually the real winner. Interest rates tagged the descending blue trendline I’ve drawn below, and since then iShares 20+ Year Treasury Bond (ARCA:TLT) has been firming up smartly. TBT, the double-short ETF based on treasury bonds, has been wilting mightily today, and it may well continue to do so into next week.