Great explanation of what went on the past few days in the SP bump past 1000 and what to expect going into Friday
Updating his Bloomberg article :
How a 2,360% Jump in Call Options Fired Up Tesla’s Share Surge
" .. In the simplest form, when someone buys calls, a dealer must buy Tesla’s stock to hedge the delta exposure generated by those options trades. If the stock keeps rising, it forces dealers to buy more shares, a process know as gamma hedging.
According to Kochuba’s analysis, Monday started with traders selling calls, which led to a slight negative delta reading. As the stock started to lift off around 10 a.m. in New York, these call sellers were forced to cover their positions. That coincided with Tesla’s share advance toward $980.
Around noon, traders began flooding in to purchase calls, sparking a surge in delta hedging that accompanied Tesla’s ascent toward $1,000. Then two hours later, another wave of call buying hit the market. The stock peaked near $1,045, right before the estimated delta hedging started to taper off.
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Note: Tesla’s stock price and option delta on Oct. 25. Source: SpotGamma
Notably, half of the calls traded were maturing Friday. The Tesla $1,050 call expiring exactly that day -- the second most active contract on Monday -- surged to $18.19 from 71 cents, a 25-fold increase.
“This was an incredible push by short duration traders to push into calls,” said Kochuba. That “ likely forced market makers to aggressively hedge long.”
The fact that all the trading was concentrated in short-dated options can be viewed as a tactic by some traders trying to take advantage of a phenomenon known as a “gamma squeeze” -- betting that as the value of Tesla shares gets closer to an option’s strike price, dealers will have to buy more and more of the underlying stock.
“This is the definition of ‘weaponized gamma,’” said Nomura strategist Charlie McElligott.
.... "