According to the crypto options exchange Deribit, roughly $1.25 billion worth of bitcoin options are set to expire today, Oct. 18 at 8:00 UTC. The put-call ratio is 0.85, and the max pain price — the price at which the most options buyers will lose money — is $64,000. This means that there is a slight bullish bias in the market, as more traders are betting on the price of bitcoin to rise than to fall. Separately, about $364 million worth of ether options will also expire at the same time. The put-call ratio is 0.62, and the max pain price is $2,500. This indicates that the market is more evenly split on the direction of ether's price, with a slight bearish bias. The expiration of these options could have a significant impact on the price of bitcoin and ether. If the price of bitcoin falls below $64,000, it could trigger a sell-off, as options buyers who are underwater will be forced to sell their coins. Similarly, if the price of ether falls below $2,500, it could lead to a decrease in demand, as options buyers who are betting on a rise in price will be forced to close their positions. Traders should be aware of the potential impact of these options expirations and take appropriate risk management measures.