T-Rex 2X Long Microsoft Daily Target ETF (MSFX)

The fund at a glance

MSFX is a leveraged exchange-traded fund that aims to return 200% — or 2x — the daily percentage change of Microsoft stock. It is not an ownership stake in Microsoft; it is a daily-reset derivative instrument designed to amplify one trading day’s worth of Microsoft’s price movement. As of mid-2026, the fund holds roughly 21 million in assets and trades with typical bid-ask spreads under 0.2%, making it liquid for intraday traders.

How daily reset leverage works

The fund does not buy Microsoft shares. Instead, it employs derivatives — primarily index futures and swaps — to create a synthetic position that tracks 2x MSFT’s daily return. Each trading day, the fund rebalances its positions to reset the leverage at 2x. This daily reset is crucial. It means the fund targets 2x return on any one trading day’s price change, not a holding period of a week or a month. If Microsoft rises $2 on a given day, MSFX targets a $4 rise (2x $2). If Microsoft falls $2, MSFX targets a $4 fall. This reset happens automatically at day’s end.

The volatility-decay trap

This is where leverage becomes dangerous for buy-and-hold investors. Suppose Microsoft closes unchanged one day (+0%), then rises 2%, then falls 2%, then rises 2% again — a four-day round trip back to starting value.

For a holder of Microsoft stock, the result is breakeven.

For a holder of MSFX, the result is a loss. Here’s why: on the -2% day, MSFX falls 4%. On subsequent +2% days, the 4% loss cannot be recouped because it is applied to a smaller base. This is volatility decay — the mathematical reality that losses (amplified by 2x) compound more severely than gains (amplified by 2x) when price moves oscillate. In flat or sideways markets, the 2x leverage works like a slow capital eraser. Even if the underlying stock finishes unchanged, the leveraged fund will finish lower.

Costs and risk

The expense ratio is 1.05% annually, a meaningful drag for a short-term trading instrument. More significant than the fee is the leverage cost embedded in the derivatives themselves. Futures and swaps used to construct the synthetic 2x position carry bid-ask friction, and the daily rebalancing incurs implicit costs as the fund resets positions. These are not separately itemized but are real.

The real risk is catastrophic loss. If Microsoft falls 50% in a single day, MSFX would fall 100% — the fund would become worthless. While a 50% one-day decline in a major megacap stock is extraordinarily unlikely, it is not impossible in a genuine financial crisis or a massive earnings shock. Investors holding MSFX through such an event would lose their entire capital.

Intended use

T-Rex, the fund sponsor, explicitly markets MSFX as a short-term trading vehicle for sophisticated traders actively managing intraday positions. The prospectus contains repeated warnings that the fund is “not appropriate for passive investors” and that it is designed for those with the expertise and time to monitor positions continuously. A trader might use MSFX to amplify exposure during a day when technicals suggest Microsoft will outperform, then sell at day’s end. The same trader would never use MSFX as a core holding in a retirement account.

The paradox of marketing a leveraged ETF

MSFX is heavily marketed via retail brokerages and appears in retail portfolios far more often than the prospectus language would suggest. Many small investors do not understand volatility decay, daily resets, or the risks of leverage. They see “2x Microsoft,” think “I want double the upside,” and buy. This is how people lose money. The fund works exactly as designed — it resets daily to 2x MSFT’s daily return. It does not work the way casual investors imagine — as a 2x long-term bet on Microsoft that will automatically double if MSFT doubles over a year. It will not. It will likely underperform Microsoft sharply, especially in volatile markets.

Suitable only for: active traders with derivative expertise, those trading intraday or over very short windows measured in days, and investors with capital they can afford to lose entirely. Unsuitable for anyone with a time horizon longer than a few trading days, any passive investor, any retirement account, and anyone who does not understand daily leverage rebalancing and volatility decay.