Why Bitcoin keeps snapping back to $70k — and the $13B options “magnet” behind it

Bitcoin’s rebound on March 4 looked odd if you only watched it through the usual “risk assets are breaking” lens. Oil was jumping, shipping insurers were repricing war risk, and traders were treating the Strait of Hormuz like a live wire. All of the headlines had the cadence of a full-blown crisis.

However, Bitcoin climbed back into the same $70,000 zone it has been orbiting for weeks, despite seeing a notable drop the weekend before.

Two factors explain that move.

The first is a pretty straightforward macro influence. Whenever the Middle East starts seeing oil shocks, markets quickly price in higher energy costs, messier supply chains, and a whole other range of negative outcomes. Joint US and Israeli strikes on Iran and retaliatory attacks across the Gulf caused disruptions in the Strait of Hormuz and led to a severe energy shock.

As threats around the Strait intensified, war risk insurance and freight rates spiked, leading to a quick surge in oil and gas prices.

The second factor is derivatives. While it’s not the only cause of the recovery, it explains why BTC can drop on shock and then rebound into a familiar price band even while the market remains nervous. The biggest effect comes from options, where hedging flows can pull the price toward crowded strike zones.

The macro shock supplied the match, but the options market supplied the dry timber already stacked around $70,000.

The shock that hit everything first: oil, Hormuz, and the cost of moving fuel

The Strait of Hormuz is a critical transit chokepoint in the global oil and gas trade. Data from 2024 showed around 20 million barrels passed through the Strait each day, equal to about 20% of the entire global consumption of petroleum liquids. (eia.gov)

When conditions in that narrow channel deteriorate, the market quickly reprices logistics, insurance, and the practical ability to export.

Between Feb. 28 and March 4, the Iran war threw the oil market into one of its biggest shocks in decades. The strikes and retaliation that followed threatened exports from the world’s most important oil-producing region.

As traffic through the strait collapsed, shipping costs soared, and insurers were pulling cover and widening risk zones, with some shipping companies even diverting around the Cape of Good Hope.

Oil is the lifeblood of the global economy, and oil prices bleed into everything else. It affects everything from transport costs and airline economics to heating costs, food logistics, and inflation expectations.

So, when oil prices spike because the world’s most important transit route is threatened, investors ask the same questions across markets: where does the risk go now?

Why Bitcoin sold first, then bounced while nerves stayed high

Bitcoin’s first move in a macro shock often looks like a simple set of liquidations. Blaming it on liquidations isn’t surprising, given that Bitcoin trades 24/7, in size, and with fewer friction points than many other instruments. So when traders want to cut exposure quickly, they sell what they can sell quickly.

And part of that is certainly true. Bitcoin dropped after the weekend strikes and saw just under $1 billion liquidated between Feb. 28 and March 1.

That’s the macro narrative: when shock hits, BTC sells quickly and in size.

But the missing piece of the puzzle is why it rebounded faster than everything else and kept pulling toward the same zone that has mattered for weeks. That is where the options market steps in.

The $70,000 area is a crowded intersection in options

Options come with a lot of Greek letters and dense terminology, so they tend to fall down the ladder of importance in times of macroeconomic shocks. But crypto options, and Bitcoin options in particular, have become so large that they have their own gravitational pull.

Large institutions now carry options exposure so large that even the slightest daily price movements force them to hedge.

Gamma measures how quickly an option’s sensitivity changes as the price moves. When gamma is high, small moves in Bitcoin can force larger hedge adjustments. That kind of trading can add speed and amplify short-term swings.

The peak gamma area for options expiring on March 5 and March 6 was around $71,000, with an elevated band from about $70,500 to $73,000. That’s the zone where hedging sensitivity peaks.

Inside it, the market can feel spring-loaded, and dips and rallies tend to travel faster because the hedging response scales up.

The strike data backs up the same point. CoinGlass data shows dense exposure between $70,000 and $75,000, so these two strikes are doing most of the work.

At $70,000, open interest sits around 9.3k puts and 9.25k calls, roughly $1.32 billion in notional exposure. At $75,000, open interest sits around 17.36k calls and 9.41k puts, roughly $1.9 billion in notional. Those figures create a corridor where a lot of risk is anchored to a narrow set of prices.

You can think of it like traffic. A city has roads everywhere, but the congestion happens at chokepoints because many routes intersect there. The chokepoint exists because the map funnels activity through it, and strike clusters do the same thing: they funnel hedging flow through a small band of prices.

March 27 matters because deadlines concentrate behavior

Looking at expiries shows one date dwarfing the rest: March 27.

That expiry carries about 111.7k calls and 74.97k puts, around $13.27 billion in notional exposure.

Total BTC options open interest also rose from about $32 billion in late February to about $36 to $37 billion in early March, which raises the influence of options-related flows during a volatile period.