Zero-days-to-expiration (0DTE) options have exploded in popularity. SPX 0DTE options now account for over 40% of all S&P 500 options volume. But are traders actually making money?

What Makes 0DTE Different

On expiration day, two forces are at their extreme:

Theta decay is maximal — Options lose their remaining time value rapidly
Gamma is maximal — Small moves in the underlying create outsized changes in option price

This combination creates a unique risk profile. Theta works for sellers (positions decay quickly), but gamma works against them (adverse moves are amplified).

The Win Rate Illusion

Many 0DTE premium sellers report high win rates — sometimes 70-80%. But win rate alone is misleading.

Consider this scenario:

You sell SPX 0DTE credit spreads 100 times
You win 75 times at $100 each = $7,500
You lose 25 times at $400 each = $10,000
Net: -$2,500 despite a 75% win rate

This is why tracking 0DTE separately from regular trades matters. The average loss on 0DTE trades is often 3-5x the average win.

Gamma Risk: The Silent Killer

At market open, an ATM SPX option with 0 DTE might have a gamma of 0.05. By 2pm, that same option could have gamma of 0.15 or higher.

What this means in practice:

A 10-point SPX move at 10am might change your delta by 0.50
The same 10-point move at 3pm might change your delta by 1.50

This is why afternoon 0DTE trades are particularly dangerous. The position becomes exponentially more sensitive to price movement.

Timing Matters

Data from experienced 0DTE traders reveals distinct performance patterns by time of day:

9:30-10:30am (Opening Range)

Higher volatility, wider spreads
Trend direction often established
Premium is richest but moves are largest

11:00am-1:00pm (Midday)

Lower volume, tighter ranges
Theta decay accelerates
Often the sweet spot for premium sellers

2:00-4:00pm (Power Hour)

Gamma acceleration kicks in
Any late-day move is amplified
Highest risk period for sellers

Commission Impact

0DTE trades typically involve more contracts (to collect meaningful premium) and tighter spreads (to manage gamma). This means commissions take a larger percentage of profit.

A $50 credit on a $5-wide spread with $6.50 in commission per round-trip means 13% of your max profit goes to your broker. Over hundreds of trades, this is significant.

How to Track Your 0DTE Performance

Most trading journals lump all trades together. TradeEdge provides dedicated 0DTE Analytics that show:

Side-by-side comparison: 0DTE win rate vs your regular trades
Timing analysis: Which hours produce your best and worst results
Strategy breakdown: Performance by strategy type (credit spreads, iron condors, etc.)
Hold time: Average duration of your 0DTE trades
Commission impact: Total fees paid on 0DTE trades specifically

Five Rules for 0DTE Traders

Size down — Use 25-50% of your normal position size
Set hard stops — Never let a 0DTE trade turn into a max loss
Avoid the last hour — Unless you have a specific edge in power hour dynamics
Track separately — Know your 0DTE numbers independent of your regular trading
Compare honestly — If your 0DTE trades underperform your regular trades, reduce or eliminate them

Key Takeaway

0DTE trading is not inherently good or bad. But the data shows that most traders underperform on 0DTE compared to their regular trades. The combination of gamma risk, commission drag, and emotional intensity makes it a challenging arena.

The only way to know if 0DTE works for you is to track the data rigorously. TradeEdge's 0DTE Analytics gives you that clarity.