Vanguard World Fund - Vanguard Mega Cap Growth ETF
ARCAMGK, the Vanguard Mega Cap Growth ETF, is down 2.5% on the week and 1.5% on Friday alone — a soft patch after a strong mid-year run, but the lending and positioning data tell a quiet story rather than a stressed one. The borrow market is about as calm as it gets for an actively-traded ETF. Availability runs at over 1,550% of current short interest — meaning there are roughly fifteen…
MGK short interest jumps 11% to 0.87% of float, reversing week-long decline as mega-cap growth ETF stabilizes.
MGK, the Vanguard Mega Cap Growth ETF, is down 2.5% on the week and 1.5% on Friday alone — a soft patch after a strong mid-year run, but the lending and positioning data tell a quiet story rather than a stressed…
MGK enters the back half of June with a notable split: short sellers who piled in last week are already trimming, while options traders remain more bullish than at any point in recent memory. The short interest story…
Snapshot as of 2 Aug 2026
Options flow on MGK tells a different story to the lending market. While short positions jumped 384% in a week, call buyers are flooding in — pushing the put-call ratio to a two-year statistical extreme. MGK's put-call…
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