---
title: "The painful lesson of shorting SPY"
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/39719519.md"
description: "Place a settlement record below. I. Strategy Framework and Starting Point I chose Put options that are bearish on the US stock market index SPY. II. Trading Mindset When SPY dipped slightly, I judged that the market would continue to adjust, so I bought Put options in batches, hoping to catch the downtrend. However, the market quickly rebounded afterwards, and the price of the Put options skidded all the way down. I first cut losses on 3 positions, wanting to reduce the loss. Seeing the price drop to around 0.7, I mistakenly thought the downward momentum was exhausted and there would be a second dip, so I heavily added 6 more positions, trying to make back the previous losses through day trading..."
datetime: "2026-04-03T17:24:58.000Z"
locales:
  - [en](https://longbridge.com/en/topics/39719519.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/39719519.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/39719519.md)
author: "[木辛sama](https://longbridge.com/en/profiles/19410595.md)"
---

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# The painful lesson of shorting SPY

Put a settlement record below

I. Strategy Framework and Starting Point

I chose Put options betting against the US stock market index SPY.

II. Trading Mindset and Process

When SPY dipped slightly, I judged that the market would continue its correction, so I bought Put options in batches, hoping to catch the downtrend. However, the market quickly rebounded, and the Put option prices plummeted. I first cut losses on 3 contracts to reduce the damage.  
Seeing the price drop to around 0.7, I mistakenly thought the downward momentum was exhausted and there would be a second dip, so I heavily added 6 more contracts, trying to recoup the previous losses through day trading. The result was the market continued its strong rebound, and the Put option price directly crashed to 0.59. I had to liquidate my position urgently and admit defeat.

III. Loss Attribution Analysis

The loss from this trade was caused by multiple overlapping factors, with the core reasons as follows:

1\. Completely wrong directional judgment (one-sided market + consolidation is the main cause)  
I bet on the market falling, but SPY experienced a slow, consolidating uptrend that day. As the underlying price rose, the intrinsic value of the Put options rapidly declined, and this is the most fundamental reason for the loss.

2\. Time decay (Theta) of short-term options accelerated the loss  
I chose short-term options expiring that day (April 1st expiry), where time value decays extremely fast (Theta is very high). When the market was rising sideways, the option price would also shrink significantly, let alone me holding a position against the trend. Time decay further amplified the loss.

3\. Complete loss of control over trading rhythm, averaging down against the trend magnified losses  
After the first stop-loss, I didn't exit the market in time. Instead, I heavily bottom-fished in the wrong direction, betting the rebound was over with 6 contracts, directly turning a small loss into a big one. This "buy more as it falls, averaging down the cost" approach is fatal in a one-sided trending market.

IV. Lessons for Longbridge Community Members

1\. Never use short-term options to bet on direction, especially those expiring within days.

For options expiring in the current month with only 1-2 days left, time decay is "cruel and relentless." Even if your direction is right, if the drop is delayed by a few hours, time value will eat up all the profits, not to mention if the direction is wrong. If you want to speculate on direction, prioritize options with 1-3 months to expiry, giving the market enough time to validate your view.

2\. In options trading, cut losses immediately when the direction is wrong. Do not average down.

Options are leveraged, decaying instruments, not stocks you can buy more of as they fall. When the direction is wrong, averaging down only takes you further down the wrong path, magnifying losses. In this trade, cutting losses on the first 3 contracts was correct, but the subsequent heavy bottom-fishing was completely wrong, directly doubling the loss.

3\. The core of options trading is risk control, not profit.

Never hold onto losing positions. Also, don't put all your capital into one trade. Test with small positions, and if you're wrong, admit it and move on. That's the way to survive in options trading.

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- [SPDR® S&P 500® ETF (SPY.US)](https://longbridge.com/en/quote/SPY.US.md)