Options market record

Lists for Thursday, May 28, 2026end of day.

On May 28, 2026, BSX calls bought: 239.77K contracts, $28.6M, 47.3× its 20-day median; BSX puts bought: 59.97K contracts, $42.1M, 22.2× its 20-day median.

Ranked by contracts bought today compared with the stock's own median over the previous 20 trading days.

Top 10 call buys vs normal

#	Symbol	Contracts bought	Dollars paid	vs normal	Price	Day change	30-day IV
1	BSX	239.77K	$28.6M	47.3×	$49.30	-$1.16	34.8%
2	BTDR	187.69K	$43M	24.3×	$18.30	+$2.76	120.2%
3	UMAC	36.24K	$19.1M	20.0×	$29.38	+$10.55	111.0%
4	RXRX	64.01K	$1.3M	18.2×	$3.43	+$0.26	100.5%
5	COPX	47.23K	$18.4M	16.1×	$88.79	+$2.70	49.8%
6	ASPI	29.84K	$3.6M	13.9×	$7.89	+$1.22	121.1%
7	S	46.34K	$5.5M	10.6×	$14.83	-$3.12	86.3%
8	TDOC	32.9K	$1.3M	10.3×	$7.52	+$0.93	100.2%
9	CNQ	12.5K	$2.3M	10.2×	$45.75	+$0.00	36.3%
10	RCAT	73.09K	$14.3M	9.6×	$14.21	+$3.54	123.7%

Top 10 put buys vs normal

#	Symbol	Contracts bought	Dollars paid	vs normal	Price	Day change	30-day IV
1	BSX	59.97K	$42.1M	22.2×	$49.30	-$1.16	34.8%
2	SILJ	50.64K	$1.6M	19.4×	$30.40	+$1.13	59.8%
3	ZS	43.9K	$158.7M	15.1×	$130.39	+$3.98	199.7%
4	PDD	74.02K	$129.4M	9.7×	$83.00	-$3.61	37.9%
5	OKTA	14.59K	$3.7M	8.1×	$103.75	+$14.25	76.4%
6	SNOW	52.95K	$30.2M	8.1×	$243.73	+$68.47	63.7%
7	PATH	36.76K	$2.6M	7.3×	$11.59	+$0.43	102.0%
8	XLK	31.86K	$1.9M	7.1×	$187.70	+$3.27	25.7%
9	BMY	22.13K	$7.6M	6.1×	$56.80	-$0.72	28.1%
10	MDB	16.53K	$17.6M	6.0×	$403.71	+$109.25	95.1%

The Terminal

See the same flowlive in the Terminal.

Explore live call and put buying across 5,000+ stocks.

$99.99/month

Get the Terminal

Cancel any time. Or $949 a year.