This is a leveraged ETF that targets 3 times the daily performance of the ICE US Treasury 20+ Year Index. It relies mainly on derivative contracts and rebalances every day to maintain its leverage ratio.

It suits investors who want to place a concentrated short-term bet on falling interest rates or a bond rally, as well as those who want a tactical tool for portfolio hedging.

It is a passively managed (index-tracking) ETF launched in 2009 by Direxion (Rafferty Asset Management).

The fund uses derivative contracts based on an index of US Treasuries with maturities of 20 years or more to deliver 3x leveraged exposure. It rebalances daily to maintain its target leverage, and because of daily compounding, the actual return over long holding periods can diverge from a simple 3x of the index.

• Daily 3x leverage maximizes the efficiency of short-term bets on falling interest rates
• Derivative contracts deliver high leverage without directly holding the underlying Treasuries

Assets under management (AUM) stand at $1.9B, and the expense ratio is 0.90% per year.

Compared with UBT (2x), TYD (3x 10-year Treasuries), and UST (2x intermediate-term), TMF has longer duration and a higher leverage multiple, so its sensitivity to interest rate changes ranks among the highest in its category.

During rising-rate cycles, downward pressure on long-term bond prices leads to steep losses given the 3x leverage, whereas it tends to rebound quickly when expectations of a shift toward falling rates take hold.

The direction of US Federal Reserve rate policy directly affects fund flows, and short-term inflows tend to increase when recession fears or demand for safe-haven assets rise.

The product delivers pronounced gains when rates fall, but it carries significant risks from rising rates and accumulating daily compounding losses.

Within the same leveraged long-term Treasury category, comparable products include UBT (2x long-term Treasuries), TYD (3x 10-year Treasuries), UST (2x intermediate-term Treasuries), and UJB, which differ in leverage multiple or targeted maturity range. UBT tracks the same long-term Treasuries at 2x and so has relatively lower volatility, while TYD tracks shorter-maturity 10-year Treasuries at 3x and so has relatively lower duration risk. For non-leveraged long-term Treasury alternatives, TLT is an option, and EDV and ZROZ, which offer ultra-long bond exposure, can also be considered.

TMF is a high-risk product intended for short-term tactical use. Before investing, you need to understand the leverage structure and the effect of daily compounding, and you should review your holding period, view on rate direction, and risk tolerance in advance.

When rates rise, the 3x leverage can cause large losses in a short period. Performance distortion from daily compounding is also a major risk over long holding periods, and in highly volatile periods losses can accumulate regardless of direction.

TMF is a high-risk leveraged product specialized for betting on falling rates or short-term portfolio hedging. For non-leveraged long-term Treasury exposure, consider TLT or EDV, and for a lower-leverage alternative, UBT is a suitable option.