Natera Options Skew Bearish With 12.6:1 Put-to-Call Ratio Near 52-Week High

A notable imbalance has emerged in the options market for Natera Inc. (NTRA), with trading data showing a put-to-call ratio of approximately 12.6-to-1. This strong bearish sentiment, reflected in 2,934 put contracts trading against just 233 calls, is particularly striking as the company's stock is trading near its 52-week high.

Details of the Options Flow

The bulk of the activity was concentrated in three large blocks of put options, accounting for 2,843 contracts. According to market data, the low open interest in two of these strikes suggests they represent newly initiated positions.

• $400 Strike Puts: 944 contracts expiring Nov. 20, 2026.
• $360 Strike Puts: 949 contracts expiring Oct. 16, 2026.
• $320 Strike Puts: 950 contracts expiring Oct. 16, 2026.

The Nov. $400 puts are the closest to the stock's current price of around $413, requiring only a roughly 3.2% decline to become profitable at expiration. The October puts, which are further out-of-the-money, would require a more significant and rapid pullback to be profitable.

Interpreting the Activity

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Market analysts typically interpret such lopsided options flow in two primary ways. One perspective is that long-term investors are hedging significant profits. Natera's stock has seen a substantial run, climbing 109% in the last six months and 152% over the past year, and investors may be buying puts as a form of portfolio insurance to lock in those gains without selling their shares.

Alternatively, the activity could represent a direct, speculative bet that the stock is poised for a correction. The fresh positioning in the November puts, in particular, could be a wager that the stock's strong upward momentum will reverse in the coming weeks. This marks a stark reversal from sentiment in June, when bullish call activity dominated Natera's options flow at a much lower share price.

Market Context

The heavy put buying comes as Natera trades near its 52-week high of $415.75. The activity also follows previously disclosed insider transactions, including sales by the Executive Chairman in March and a director in June under pre-arranged 10b5-1 trading plans.

While the put-to-call ratio indicates a strong bearish tilt, the traders' ultimate strategy remains unclear. The puts could be one side of a more complex trade, such as a collar or spread, which would alter the overall market view. Without a disclosed position, the intent behind the trades is ambiguous.