Statistics of Price Movements of Alkermes Plc (ALKS)

The price movements of Alkermes Plc (ticker ALKS) are summarized in five ways:

• Table 1. Statistics of daily price changes using the closing prices
• Table 2. Statistics of daily price changes using the closing and opening prices
• Table 3 – 7. Statistics of daily price changes when ALKS opened with an increase of 1%, 2%, 3%, 4%, or more than 5%
• Table 8 – 10. Statistics of stock price changes in the 20 days after ALKS had a big price move
• Table 11. Statistics of daily price changes in the 20 days after ALKS moved 5% with twice the 30-day average volume

The statistics are calculated using ALKS's price data across 1,546 trading days from 2015 to 2020.

Table 1. Statistics of ALKS one-day price changes

In this table, the one-day price change is calculated using the closing price and the previous day's closing price.

In the past 1,546 trading days, 48.0% of the time (741 days), ALKS closed above the previous day's closing price. 47.6% of the time (736 days), it closed below the previous day's closing price. 4.4% of the time (68 days), it did not change.

Also see: VIX price movement study.

ALKS Price Change (%)	Number of Days	% of Total Sessions
27 – 28%	1	0.06%
12 – 13%	1	0.06%
11 – 12%	1	0.06%
10 – 11%	2	0.13%
9 – 10%	5	0.32%
8 – 9%	4	0.26%
7 – 8%	6	0.39%
6 – 7%	18	1.17%
5 – 6%	18	1.17%
4 – 5%	42	2.72%
3 – 4%	54	3.50%
2 – 3%	113	7.31%
1 – 2%	204	13.20%
0 – 1%	272	17.61%
0%	68	4.40%
0 – -1%	253	16.38%
-1 – -2%	200	12.94%
-2 – -3%	129	8.35%
-3 – -4%	63	4.08%
-4 – -5%	43	2.78%
-5 – -6%	15	0.97%
-6 – -7%	13	0.84%
-7 – -8%	7	0.45%
-8 – -9%	4	0.26%
-9 – -10%	1	0.06%
-10 – -11%	2	0.13%
-12 – -13%	2	0.13%
-13 – -14%	1	0.06%
-15 – -16%	1	0.06%
-21 – -22%	1	0.06%
-44 – -45%	1	0.06%

Table 2. Statistics of ALKS: Closing vs. Open

In this table, instead of using the closing price of the previous day, the opening price is used to calculate the one-day price change of ALKS.

47.0% of the time (727 days), ALKS closed above the opening price. 49.3% of the time (762 days), it closed below the opening price. 3.7% of the time (57 days), it closed where it started.

Closing - Open (%)	Number of Days	% of Total Sessions
12 – 13%	1	0.06%
10 – 11%	1	0.06%
9 – 10%	7	0.45%
8 – 9%	2	0.13%
7 – 8%	2	0.13%
6 – 7%	12	0.78%
5 – 6%	19	1.23%
4 – 5%	36	2.33%
3 – 4%	62	4.01%
2 – 3%	109	7.05%
1 – 2%	197	12.74%
0 – 1%	279	18.05%
0%	57	3.69%
0 – -1%	286	18.50%
-1 – -2%	202	13.07%
-2 – -3%	128	8.28%
-3 – -4%	73	4.72%
-4 – -5%	32	2.07%
-5 – -6%	11	0.71%
-6 – -7%	18	1.16%
-7 – -8%	4	0.26%
-8 – -9%	2	0.13%
-9 – -10%	2	0.13%
-11 – -12%	1	0.06%
-12 – -13%	1	0.06%
-14 – -15%	1	0.06%
-17 – -18%	1	0.06%

Table 3. One-day performance when ALKS opened 5% higher than previous close

In the past 1,546 trading days, ALKS opened more than 5% higher than the previous day's closing price 8 times. Of these days, 12.5% (1 days) had closing prices above the opening price, and 87.5% (7 days) had closing prices below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
2 – 3%	1	12.50%
-1 – -2%	2	25.00%
-2 – -3%	1	12.50%
-3 – -4%	1	12.50%
-6 – -7%	1	12.50%
-7 – -8%	1	12.50%
-17 – -18%	1	12.50%

Table 4. Closing vs. open when ALKS opened 4–5% higher

On 4 days, ALKS opened 4–5% higher than the previous day's closing price. Of these days, 50.0% (2 days) had closing prices above the opening price, and 50.0% (2 days) had closing prices below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
4 – 5%	1	25.00%
3 – 4%	1	25.00%
-2 – -3%	1	25.00%
-3 – -4%	1	25.00%

Table 5. Closing vs. open when ALKS open 3 – 4% higher

11 times ALKS opened 3 – 4% higher than the previous day's closing price. Among these days, 45.5% (5 days) closed above the opening price, 54.5% (6 days) closed below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
5 – 6%	1	9.09%
3 – 4%	1	9.09%
2 – 3%	1	9.09%
0 – 1%	2	18.18%
0 – -1%	2	18.18%
-1 – -2%	1	9.09%
-2 – -3%	1	9.09%
-3 – -4%	2	18.18%

Table 6. Closing vs. open when ALKS open 2 – 3% higher

19 times ALKS opened 2 – 3% higher than the previous day's closing price. Among these days, 42.1% (8 days) closed above the opening price, 57.9% (11 days) closed below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
5 – 6%	1	5.26%
4 – 5%	1	5.26%
2 – 3%	2	10.53%
1 – 2%	2	10.53%
0 – 1%	2	10.53%
0 – -1%	3	15.79%
-1 – -2%	2	10.53%
-2 – -3%	3	15.79%
-3 – -4%	1	5.26%
-6 – -7%	1	5.26%
-9 – -10%	1	5.26%

Table 7. Closing vs. open when ALKS open 1 – 2% higher

125 times ALKS opened 1 – 2% higher than the previous day's closing price. Among these days, 45.6% (57 days) closed above the opening price, 54.4% (68 days) closed below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
9 – 10%	1	0.80%
6 – 7%	1	0.80%
5 – 6%	2	1.60%
4 – 5%	4	3.20%
3 – 4%	5	4.00%
2 – 3%	11	8.80%
1 – 2%	15	12.00%
0 – 1%	18	14.40%
0 – -1%	23	18.40%
-1 – -2%	14	11.20%
-2 – -3%	10	8.00%
-3 – -4%	11	8.80%
-4 – -5%	3	2.40%
-5 – -6%	2	1.60%
-6 – -7%	3	2.40%
-7 – -8%	1	0.80%
-12 – -13%	1	0.80%

Table 8. Periods when ALKS moved 15% or more

In this table, we track the price movements in the 20 days after ALKS had a one-day price change of at least 15%.

Date	Price Change	Price Change after 15% Move
Days after:		1	4	7	10	13	16	19
20161021	27.8%	1.9	-7.0	-6.7	-6.6	4.3	6.1	7.0
20180621	-15%	1.1	-7.1	-4.0	-5.6	-.8	1.4	3.1
20180402	-21.9%	-3.4	-6.7	-4.9	-1.8	2.0	-1.9	-1.1
20160121	-44.2%	7.3	-3.9	-2.8	-1.1	-13.7	-3.7	3.6

Table 8a. ALKS average price changes following a 15% up day

Of the 1,546 trading days from 2015 to 2020, there were 1 days in which ALKS was up more than 15%. This table shows the average price changes over the 1 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ 15%	1.9	-7.0	-6.7	-6.6	4.3	6.1	7.0

Table 8b. ALKS average price changes following a 15% down day

Of the 1,546 trading days from 2015 to 2020, there were 3 days in which ALKS was down more than -15%. This table shows the average price changes over the 3 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ -15%	1.7	-5.9	-3.9	-2.8	-4.2	-1.4	1.9

Table 9. Periods when ALKS moved 10% or more

In this table, we track the price movements in the 20 days after ALKS had a one-day price change of at least 10%.

Date	Price Change	Price Change after 10% Move
Days after:		1	4	7	10	13	16	19
20161021	27.8%	1.9	-7.0	-6.7	-6.6	4.3	6.1	7.0
20201210	12.6%
20171026	11%	-9.3	-11.5	-11.3	-12.6	-13.2	-12.0	-8.8
20200205	10.7%	-1.4	-1.5	-8.4	-3.8	1.9	1.2	3.4
20150616	10.1%	-.9	3.8	1.0	-.3	-2.2	-4.3	.8
20180222	-10.5%	3.6	.9	5.9	7.4	6.7	8.3	7.0
20200429	-10.5%	-4.8	-.5	4.1	7.1	14.4	15.2	12.3
20180205	-12.1%	-.1	-3.2	6.5	20.8	1.5	3.1	7.8
20190425	-12.7%	.7	-6.0	-5.8	-11.5	-15.5	-18.0	-17.4
20200316	-13.3%	-4.7	-4.4	1.1	2.9	.2	6.3	10.3
20180621	-15%	1.1	-7.1	-4.0	-5.6	-.8	1.4	3.1
20180402	-21.9%	-3.4	-6.7	-4.9	-1.8	2.0	-1.9	-1.1
20160121	-44.2%	7.3	-3.9	-2.8	-1.1	-13.7	-3.7	3.6

Table 9a. ALKS average price changes following a 10% up day

Of the 1,546 trading days from 2015 to 2020, there were 5 days in which ALKS was up more than 10%. This table shows the average price changes over the 5 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ 10%	-1.3	-3.2	-5.1	-4.6	-1.9	-1.8	.5

Table 9b. ALKS average price changes following a 10% down day

Of the 1,546 trading days from 2015 to 2020, there were 8 days in which ALKS was down more than -10%. This table shows the average price changes over the 8 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ -10%	-.0	-3.9	.0	2.3	-.7	1.3	3.2

Table 10. Periods when ALKS moved 5% or more

In this table, we track the price movements in the 20 days after ALKS had a one-day price change of at least 5%.

Date	Price Change	Price Change after 5% Move
Days after:		1	4	7	10	13	16	19
20161021	27.8%	1.9	-7.0	-6.7	-6.6	4.3	6.1	7.0
20201210	12.6%
20171026	11%	-9.3	-11.5	-11.3	-12.6	-13.2	-12.0	-8.8
20200205	10.7%	-1.4	-1.5	-8.4	-3.8	1.9	1.2	3.4
20150616	10.1%	-.9	3.8	1.0	-.3	-2.2	-4.3	.8
20150107	9.5%	-2.3	.9	4.9	3.0	6.9	8.1	3.7
20160520	9.4%	-.2	3.0	8.0	4.8	6.1	-1.2	-1.9
20200220	9.4%	-.9	-.8	4.0	.1	-13.6	-21.0	-36.1
20201109	9.3%	.9	-.6	.7	1.8	2.9	3.1	6.5
20200319	9.1%	-6.2	-.8	1.0	-1.7	4.3	8.2	8.2
20180202	8.7%	-12.2	-15.4	-13.8	6.1	-.4	-8.4	-9.5
20200313	8.7%	-13.3	-11.6	-12.9	-10.8	-13.9	-6.1	-4.4
20180214	8.4%	7.5	9.2	-1.2	-3.7	1.0	2.4	1.8
20151216	8.1%	-1.2	-3.0	.6	.1	-4.9	-8.4	-13.5
20200518	7.8%	-1.8	2.4	1.7	1.0	2.2	4.9	-.7
20161109	7.7%	1.8	2.4	.7	1.7	-.4	-5.4	.4
20180215	7.5%	5.5	-.9	-8.8	-9.9	-7.6	-8.3	-3.5
20160122	7.3%	-.6	-15.3	-8.5	-11.0	-17.5	-10.3	-9.2
20200406	7.2%	-1.8	1.8	1.8	9.6	3.1	6.3	-12.1
20160329	7.1%	-.5	12.3	17.5	17.6	22.5	29.6	32.0
20160516	6.9%	-.2	7.3	8.8	15.2	17.3	14.6	6.5
20150501	6.7%	-2.5	-4.0	-.6	1.5	5.1	3.8	1.4
20170104	6.7%	-1.1	-2.4	-7.4	-6.8	-6.9	-8.4	-9.7
20190910	6.7%	4.7	3.3	-4.0	-8.2	-11.2	-15.7	-17.1
20150116	6.6%	.0	-1.4	.8	3.2	-1.2	-5.2	4.7
20160301	6.6%	2.3	-1.4	-8.3	-11.8	-12.2	-10.0	-12.2
20150908	6.5%	-.8	3.8	5.8	-3.1	-10.5	-14.7	-13.1
20150930	6.5%	1.4	-.3	3.7	1.0	6.3	3.4	9.2
20160628	6.4%	2.1	6.9	12.8	15.1	11.7	14.1	17.7
20200408	6.4%	-2.5	-1.8	3.3	1.6	4.2	-13.4	-9.5
20190729	6.3%	6.0	2.0	-.6	-1.4	-4.6	-.4	-8.2
20150902	6.2%	-.3	9.0	12.4	12.7	7.9	2.1	-12.7
20151029	6.2%	1.3	1.4	1.6	.6	4.6	1.8	4.3
20190328	6.2%	2.3	.2	4.7	.7	-4.0	-5.8	-2.6
20160331	6.1%	4.3	12.1	12.1	15.3	18.3	24.8	18.7
20200228	6.1%	1.9	-1.8	-15.3	-22.6	-37.3	-35.5	-31.0
20200219	6%	9.4	6.7	11.6	8.9	-6.6	-20.5	-28.6
20201007	6%	-.5	.6	-.1	-3.7	-6.1	-4.1	6.7
20160322	5.9%	-4.9	-7.2	5.0	11.8	18.0	19.5	22.0
20190730	5.9%	-.0	-7.3	-1.3	-5.3	-6.6	-4.0	-15.5
20201029	5.7%	-.2	11.1	9.3	10.8	12.0	13.2	13.4
20170301	5.6%	2.4	-1.5	-4.2	-3.5	-.1	-1.7	-.6
20180109	5.6%	3.7	3.7	-.9	4.5	4.6	.9	-1.7
20190104	5.6%	2.0	8.3	10.1	13.8	8.1	8.5	9.6
20180216	5.5%	.0	-15.9	-14.6	-10.7	-13.0	-10.0	-8.4
20181226	5.5%	-2.0	.0	1.7	9.2	9.4	14.6	12.0
20150112	5.3%	-1.8	2.0	.2	4.0	5.2	.9	1.3
20160406	5.3%	-.8	-.7	3.4	9.4	11.5	7.8	2.3
20160701	5.3%	.0	5.5	7.8	4.5	6.8	10.1	5.7
20191115	5.3%	-4.0	-4.4	.7	.1	1.1	3.5	1.2
20160912	5.2%	-1.2	3.7	5.7	1.8	-2.2	-3.3	-4.3
20190604	5.2%	-.8	-3.5	-5.0	-5.8	-4.3	-9.0	-3.2
20190808	5.2%	-3.0	-7.4	-3.5	-6.6	-12.3	-8.3	-13.2
20200417	5.2%	1.5	-4.5	-1.6	-18.6	-12.6	-4.2	-9.0
20200616	5.2%	-.6	9.8	12.2	13.0	14.0	18.8	10.8
20190718	5.1%	-4.2	-5.7	-10.0	-5.3	-12.1	-8.6	-12.8
20200611	-5%	2.6	7.1	18.4	20.9	21.7	22.9	28.0
20191010	-5.1%	4.2	5.4	6.5	12.8	15.8	13.9	13.9
20180907	-5.2%	-1.5	-2.4	-4.1	2.1	4.2	5.5	6.9
20160128	-5.3%	4.5	8.9	-3.9	1.8	8.7	9.6	11.2
20160627	-5.3%	6.5	13.8	14.9	22.9	18.9	18.1	24.5
20170517	-5.3%	1.2	.9	.8	.9	1.4	5.4	2.4
20150921	-5.5%	-2.1	-9.6	-13.9	-12.2	-12.1	-15.0	-10.0
20191001	-5.5%	1.1	-.6	-6.1	-.1	-1.5	1.2	6.1
20200303	-5.5%	1.4	-13.1	-26.0	-33.5	-33.3	-29.5	-28.2
20150831	-5.6%	-.3	8.4	14.6	19.9	22.2	11.9	3.4
20200821	-5.6%	-2.2	-5.2	-4.0	-4.3	.6	4.7	5.6
20150325	-5.7%	.8	-2.4	-3.8	1.2	3.4	2.0	.6
20160104	-5.7%	.6	-4.8	-14.7	-16.7	-55.0	-53.5	-57.2
20160218	-5.8%	2.2	3.7	-1.8	.2	-1.3	.2	-11.6
20160315	-5.9%	-4.3	1.2	3.9	6.6	17.5	26.2	26.2
20181219	-6%	-.4	-6.5	-4.7	-2.6	2.4	8.7	10.5
20190501	-6%	.6	-3.2	-7.7	-10.8	-13.9	-15.7	-18.6
20190823	-6%	-2.4	4.6	-.4	.9	15.2	13.8	5.7
20150806	-6.1%	-.8	.2	.7	-7.3	-15.1	-6.8	-6.8
20150824	-6.1%	1.6	11.5	11.4	14.0	23.0	26.1	27.3
20160113	-6.1%	1.3	-6.8	-43.4	-49.3	-48.7	-47.8	-54.5
20190917	-6.1%	.2	-.7	-7.4	-14.0	-13.7	-15.0	-16.6
20200320	-6.1%	.4	7.5	7.8	5.5	18.3	14.9	16.2
20200729	-6.2%	-2.7	-1.1	-1.1	-1.6	-.7	-4.3	-12.9
20160303	-6.4%	-1.0	-3.4	-1.9	-8.9	-1.1	-4.2	-2.1
20150427	-6.6%	-1.7	1.6	-4.0	2.3	3.2	7.9	5.5
20170111	-6.6%	.1	-.1	2.5	1.9	-4.3	1.2	.3
20160127	-6.8%	-5.3	2.2	-.6	-7.8	.2	1.5	5.3
20160728	-7%	3.7	3.0	-1.9	-2.7	-2.8	-7.8	-7.6
20200306	-7.1%	-8.2	-21.9	-29.8	-29.5	-25.5	-24.2	-26.2
20181102	-7.5%	-.2	3.3	-10.3	-8.6	-9.0	-5.3	-5.3
20200213	-7.5%	.7	5.8	12.0	11.2	13.7	7.6	-7.9
20150928	-7.6%	-3.2	6.3	5.4	3.8	8.5	6.5	8.0
20181112	-7.8%	-2.4	-.6	-1.0	3.0	3.0	1.2	-2.0
20200311	-7.9%	-8.7	-18.0	-17.7	-13.0	-11.4	-13.7	-8.5
20200309	-8.1%	1.3	-7.5	-25.1	-22.9	-17.5	-17.3	-19.0
20160208	-8.4%	-1.3	10.2	18.5	15.5	15.3	16.8	10.6
20200312	-8.6%	8.8	-12.0	-9.4	-3.0	-2.8	-4.9	6.7
20190725	-8.7%	-1.6	10.9	2.8	9.5	5.1	3.6	6.5
20171027	-9.3%	-1.9	-2.0	-4.3	-4.0	-3.6	-4.2	.6
20180222	-10.5%	3.6	.9	5.9	7.4	6.7	8.3	7.0
20200429	-10.5%	-4.8	-.5	4.1	7.1	14.4	15.2	12.3
20180205	-12.1%	-.1	-3.2	6.5	20.8	1.5	3.1	7.8
20190425	-12.7%	.7	-6.0	-5.8	-11.5	-15.5	-18.0	-17.4
20200316	-13.3%	-4.7	-4.4	1.1	2.9	.2	6.3	10.3
20180621	-15%	1.1	-7.1	-4.0	-5.6	-.8	1.4	3.1
20180402	-21.9%	-3.4	-6.7	-4.9	-1.8	2.0	-1.9	-1.1
20160121	-44.2%	7.3	-3.9	-2.8	-1.1	-13.7	-3.7	3.6

Table 10a. ALKS average price changes following a 5% up day

Of the 1,546 trading days from 2015 to 2020, there were 56 days in which ALKS was up more than 5%. This table shows the average price changes over the 56 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ 5%	-.3	-.1	.5	.6	-.3	-.6	-1.8

Table 10b. ALKS average price changes following a 5% down day

Of the 1,546 trading days from 2015 to 2020, there were 48 days in which ALKS was down more than -5%. This table shows the average price changes over the 48 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ -5%	-.2	-.8	-2.7	-1.6	-1.2	-.6	-.8

28 stocks with statistics: AAPL, AMD, AMZN, APPN, AZN, BA, BAC, BIIB, CRM, CSCO, CX, DIS, FB, GE, GM, GOOG, IBM, INTC, JPM, JPM, MSFT, MU, NFLX, O, QQQ, SPY, T, TSLA,

Also see: VIX price movement study.