Statistics of Price Movements of Amazon.com Inc (AMZN)

The price movements of Amazon.com Inc (ticker AMZN) 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 AMZN 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 AMZN had a big price move
• Table 11. Statistics of daily price changes in the 20 days after AMZN moved 5% with twice the 30-day average volume

The statistics are calculated using AMZN's price data across 1,547 trading days from 2015 to 2020.

Table 1. Statistics of AMZN 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 1,547 trading days, 53.2% of the time (822 days), AMZN closed above the previous day's closing price. 43.4% of the time (671 days), it closed below the previous day's closing price. 3.4% of the time (53 days), it did not change.

Also see: VIX price movement study.

AMZN Price Change (%)	Number of Days	% of Total Sessions
14 – 15%	1	0.06%
13 – 14%	2	0.13%
9 – 10%	3	0.19%
8 – 9%	1	0.06%
7 – 8%	5	0.32%
6 – 7%	5	0.32%
5 – 6%	6	0.39%
4 – 5%	18	1.16%
3 – 4%	36	2.33%
2 – 3%	80	5.17%
1 – 2%	230	14.88%
0 – 1%	435	28.14%
0%	53	3.43%
0 – -1%	390	25.23%
-1 – -2%	151	9.77%
-2 – -3%	61	3.95%
-3 – -4%	35	2.26%
-4 – -5%	14	0.91%
-5 – -6%	12	0.78%
-6 – -7%	4	0.26%
-7 – -8%	4	0.26%

Table 2. Statistics of AMZN: 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 AMZN.

48.2% of the time (745 days), AMZN closed above the opening price. 48.4% of the time (748 days), it closed below the opening price. 3.5% of the time (54 days), it closed where it started.

Closing - Open (%)	Number of Days	% of Total Sessions
7 – 8%	1	0.06%
6 – 7%	2	0.13%
5 – 6%	3	0.19%
4 – 5%	11	0.71%
3 – 4%	16	1.03%
2 – 3%	74	4.78%
1 – 2%	197	12.73%
0 – 1%	441	28.51%
0%	54	3.49%
0 – -1%	462	29.86%
-1 – -2%	170	10.99%
-2 – -3%	71	4.59%
-3 – -4%	27	1.75%
-4 – -5%	10	0.65%
-5 – -6%	4	0.26%
-6 – -7%	2	0.13%
-7 – -8%	1	0.06%
-8 – -9%	1	0.06%

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

In the past 1,547 trading days, AMZN opened more than 5% higher than the previous day's closing price 14 times. Of these days, 28.6% (4 days) had closing prices above the opening price, and 71.4% (10 days) had closing prices below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
4 – 5%	1	7.14%
2 – 3%	1	7.14%
1 – 2%	2	14.29%
0 – -1%	1	7.14%
-1 – -2%	1	7.14%
-2 – -3%	3	21.43%
-3 – -4%	3	21.43%
-4 – -5%	1	7.14%
-8 – -9%	1	7.14%

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

On 3 days, AMZN opened 4–5% higher than the previous day's closing price. Of these days, 100.0% (3 days) had closing prices above the opening price, and 0.0% (0 days) had closing prices below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
4 – 5%	1	33.33%
1 – 2%	1	33.33%
0 – 1%	1	33.33%

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

6 times AMZN opened 3 – 4% higher than the previous day's closing price. Among these days, 33.3% (2 days) closed above the opening price, 66.7% (4 days) closed below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
3 – 4%	1	16.67%
1 – 2%	1	16.67%
0 – -1%	1	16.67%
-1 – -2%	1	16.67%
-2 – -3%	1	16.67%
-3 – -4%	1	16.67%

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

21 times AMZN opened 2 – 3% higher than the previous day's closing price. Among these days, 61.9% (13 days) closed above the opening price, 38.1% (8 days) closed below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
4 – 5%	1	4.76%
3 – 4%	2	9.52%
2 – 3%	1	4.76%
1 – 2%	5	23.81%
0 – 1%	4	19.05%
0 – -1%	5	23.81%
-2 – -3%	2	9.52%
-4 – -5%	1	4.76%

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

146 times AMZN opened 1 – 2% higher than the previous day's closing price. Among these days, 47.3% (69 days) closed above the opening price, 52.7% (77 days) closed below the opening price.

Closing - Open (%)	Number of Days	% of Total Sessions
7 – 8%	1	0.68%
6 – 7%	1	0.68%
4 – 5%	2	1.37%
3 – 4%	3	2.05%
2 – 3%	15	10.27%
1 – 2%	16	10.96%
0 – 1%	31	21.23%
0 – -1%	44	30.14%
-1 – -2%	13	8.90%
-2 – -3%	12	8.22%
-3 – -4%	4	2.74%
-4 – -5%	3	2.05%
-7 – -8%	1	0.68%

Table 8. Periods when AMZN moved 15% or more

In this table, we track the price movements in the 20 days after AMZN 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

Table 9. Periods when AMZN moved 10% or more

In this table, we track the price movements in the 20 days after AMZN 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
20150424	14.1%	-1.5	-5.2	-5.4	-2.6	-4.1	-4.5	-3.0
20150130	13.7%	2.8	5.5	5.2	7.7	5.3	7.2	8.5
20171027	13.2%	.9	-.6	2.0	2.2	2.3	2.3	5.0

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

Of the 1,547 trading days from 2015 to 2020, there were 3 days in which AMZN was up more than 10%. 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 ≥ 10%	.7	-.1	.6	2.5	1.2	1.7	3.5

Table 10. Periods when AMZN moved 5% or more

In this table, we track the price movements in the 20 days after AMZN 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
20150424	14.1%	-1.5	-5.2	-5.4	-2.6	-4.1	-4.5	-3.0
20150130	13.7%	2.8	5.5	5.2	7.7	5.3	7.2	8.5
20171027	13.2%	.9	-.6	2.0	2.2	2.3	2.3	5.0
20150724	9.7%	.4	1.4	.5	-1.3	-.7	1.1	-2.6
20160429	9.5%	3.7	-.1	6.6	7.6	5.7	5.6	8.4
20181226	9.4%	-.6	2.1	7.1	12.8	9.9	15.1	11.0
20160128	8.9%	-7.6	-16.4	-23.2	-20.7	-18.0	-15.8	-12.8
20200720	7.9%	-1.8	-5.9	-5.1	-2.7	.9	-3.6	-1.5
20150826	7.3%	3.5	-.8	-.4	3.2	4.1	7.6	7.5
20200131	7.3%	-.2	2.1	7.1	6.3	8.0	.0	-6.2
20181025	7%	-7.8	-10.3	-8.7	-1.5	-8.5	-10.6	-14.9
20200317	7%	1.2	5.3	8.2	7.8	5.5	13.0	20.0
20181107	6.8%	-.0	-7.1	-9.2	-13.6	-9.9	-4.7	-5.0
20200313	6.4%	-5.4	5.4	8.7	6.4	6.9	11.9	14.4
20151023	6.2%	1.6	4.6	4.4	10.1	12.4	8.1	10.4
20200413	6.1%	5.3	9.5	9.0	9.6	14.1	6.9	9.7
20181128	6%	-.2	-.6	-2.9	-.8	-9.3	-12.9	-19.9
20200706	5.7%	-1.9	4.7	-1.6	4.6	-2.3	-1.9	3.5
20200922	5.6%	-4.1	1.4	2.9	-.9	5.0	7.5	2.5
20181126	5.2%	.0	6.9	5.5	3.8	4.9	-1.9	-12.9
20200414	5.2%	1.1	4.8	5.1	1.3	.1	3.0	5.5
20190104	5%	3.4	5.1	6.3	7.7	4.1	4.0	9.1
20200310	5%	-3.8	-10.7	-.6	2.6	.4	.8	5.6
20181119	-5%	-1.1	-.7	10.9	17.2	12.4	8.7	5.3
20161028	-5.1%	1.7	-1.2	1.5	-4.8	-3.8	.5	.5
20180402	-5.2%	1.5	2.4	4.0	5.1	13.5	6.4	14.6
20200309	-5.2%	5.1	-.9	1.6	5.7	8.6	8.3	5.9
20190201	-5.3%	.4	-.7	.7	-1.1	-.3	.4	.8
20200316	-5.3%	7.0	9.3	11.6	16.3	13.6	19.1	20.9
20201030	-5.4%	-1.0	3.3	3.1	2.7	2.7	5.2	5.5
20160104	-5.7%	-.5	-4.7	-8.7	-10.5	-9.7	-5.6	-7.8
20181221	-5.7%	-2.4	6.1	9.0	14.4	20.5	17.4	22.9
20160113	-5.8%	1.9	-1.3	2.5	.3	-1.2	-7.8	-17.1
20181204	-5.8%	.0	-1.6	-.6	-7.0	-17.4	-11.8	-10.0
20181024	-5.9%	7.1	-8.0	.1	5.5	-1.6	-2.7	-10.1
20181010	-6.1%	-2.0	3.7	.5	-5.2	-12.3	-5.1	-6.4
20150824	-6.2%	.6	11.8	10.2	7.7	12.7	12.7	16.6
20160205	-6.3%	-2.8	.3	3.8	6.5	10.3	10.0	15.0
20181029	-6.3%	-.5	8.2	14.1	6.4	5.2	-2.8	-2.4
20200501	-7.5%	1.3	3.6	3.1	5.4	9.3	6.6	5.0
20160129	-7.6%	-2.1	-8.6	-17.9	-13.6	-9.0	-4.7	-5.4
20181026	-7.8%	-6.3	1.4	.0	4.2	-2.7	-7.9	-7.7
20200312	-7.9%	6.5	9.1	13.5	16.6	16.3	13.7	21.9

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

Of the 1,547 trading days from 2015 to 2020, there were 23 days in which AMZN was up more than 5%. This table shows the average price changes over the 23 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ 5%	-.5	.0	.9	2.2	1.6	1.7	1.8

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

Of the 1,547 trading days from 2015 to 2020, there were 20 days in which AMZN was down more than -5%. This table shows the average price changes over the 20 days.

Average Type	Average Price Change
Days after:	1	4	7	10	13	16	19
Avg for Change ≥ -5%	.7	1.6	3.2	3.6	3.3	3.0	3.4

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Also see: VIX price movement study.