Vanguard World Fund - Vanguard Morningstar Mega Cap Growth ETF
ARCAMGK posted its strongest weekly performance in months, climbing 7.1% to $90.42 — but the more interesting story is how investor positioning has shifted beneath the surface. Options traders have rarely been this directionally confident in the ETF's recent history. The put/call ratio dropped to 0.30, below its 20-day average of 0.32 and well beneath the 52-week high of 1.44. That…
MGK short interest jumps 35% in one week, now at 1.12% of float, as cost to borrow climbs 30% to 0.85% annually.
MGK posted its strongest weekly performance in months, climbing 7.1% to $90.42 — but the more interesting story is how investor positioning has shifted beneath the surface. Options traders have rarely been this…
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…
Snapshot as of 16 Sept 2026
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…
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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