iShares National Muni Bond ETF · ARCX · ETF · 131 sessions on record
$101.10▲ +0.82 · +0.8%from $100.28 the session before · Sep 30, 2026 close · end of day
Open
$100.66
High
$101.32
Low
$100.60
Day's range
$0.720.72% of the previous close
VWAP
$101.09close +0.01% from it
Volume, shares
23.9M1.72× the 20-session average
Traded, $
$2.42B
Trades
56.1K430 shares per trade
Previous close
$100.28+0.82 to the close
Market cap
—
Day range69% of the way up
$100.60$101.32
52-week range13% of the way up
$100.07 Sep 29$107.77 Jun 30
−6.2% from the high · +1.0% from the low
The desk read · Sep 30expiry Oct 16 · 16 days
put-heavy
options read
calls 29% · puts 71% of OI
2.39
puts per call, by OI
Oct 16 expiry 1.65
$104.00
max pain
+2.9% from the close
$104.00
most call OI
12.1K contracts · +2.9% from the close
▲ +1.1%
option OI on the day
+799 contracts · 74.5K open
Put-heavy into a 16-day expiry: 2.39 puts per call by open interest, option OI +1.1% on the day, the most call OI sits at $104.00, the most put OI at $102.00, max pain $104.00.
Options
Sep 30 open interest · 6 expiries listed
MUB options carry 74.5K contracts of open interest across 6 expiries, 66% of it in the Oct 16 contract, with 2.39 puts per call.
Open interest by expirythe next 6 of 6 expiries · share of all open interest
Option open interest by expiry, the next 6 expiries
Expiry
Call OI · on the day
Put OI · on the day
Puts per call
Share of OI %
Strikes
Oct 1616 days
18.6K+880
30.6K−153
1.65
66
29
Nov 2051 days
200+19
1.54K+3
7.70
2.3
30
Jan 15107 days
2.54K0
19.5K+14
7.66
30
36
Feb 19142 days
81+25
117+2
1.44
0.27
29
May 21233 days
9+6
23+9
2.56
0.04
29
Jan 21478 days
576−7
794+1
1.38
1.8
38
34% of open interest sits beyond the Oct 16 contract · 29 strikes listed for it · 74.5K contracts open in all
Monthly contractOct 16 expiry · 16 days
The Oct 16 contract holds 18.6K calls and 30.6K puts, the most call OI at $104.00 and the most put OI at $102.00; max pain $104.00, +2.9% from the close.
Call OI, contracts
18.6K+880 on the day
Put OI, contracts
30.6K−153 on the day
Puts per call, by OI
1.65all expiries 2.39
Max pain
$104.00+2.9% from the close
Strikes listed
29for this expiry
Open interest by strike, contractstop three strikes each side
Calls
Strike
Puts
12.1K
$104.00
10K
5.15K
$103.00
$102.00
10.3K
901
$101.00
$99.00
5.1K
Open interest added on the day, contractsthree largest additions each side
Calls
Strike
Puts
+3
$104.00
+9
$103.00
+865
$101.00
$100.00
+19
$99.00
+20
$98.00
+29
Close $ · S&P 500 rebased to the first close126 sessions to Sep 30 · axis fixed at 4 × ATR-14 around the last close · hover or tap a session and the read beside the chart follows it
OI Charts is not a registered investment adviser or broker-dealer. Prices, filings and open interest are public data and arithmetic on it, not a basis for any investment decision.