Dollar cost averaging (DCA) in ROCK means investing a fixed amount at regular intervals, regardless of share price. This strategy reduces timing risk and builds wealth steadily through market ups and downs.
How This Calculator Works
Our DCA calculator simulates real market conditions using historical price data. It accounts for dividend reinvestment (DRIP), where each dividend payment automatically purchases additional shares. You can adjust the investment amount, frequency, time period, and compare against benchmarks like the S&P 500 and Nasdaq-100.
More ROCK Analysis
ROCK DCA Calculator
Dollar Cost Averaging — Gibraltar Industries, Inc.
Same amount invested each month — only the day of purchase changes. How much does intra-month timing actually matter?
Best Timing DCA
StrategyBuy on monthly low
Total Return-28.4%
Final Value$34.4K
Perfectly timed — impossible in practice
Your DCA
StrategyBuy on 1st of month
Total Return-32.8%
Final Value$32.3K
Consistent — no timing needed
Worst Timing DCA
StrategyBuy on monthly high
Total Return-36.3%
Final Value$30.6K
Worst possible — still beats not investing
Best vs Worst gap7.9 pp
Your timing vs best-4.4%
Your timing vs worst+3.5%
If You Keep Investing…
Based on this stock's historical CAGR of -6.1%/yr — put in vs. walk away with.
Your Plan
At $500/mo, this could grow into:
3 Years$18K~1.0x your moneyfrom $18K invested
5 Years$30K~1.0x your moneyfrom $30K invested
10 Years$60K~1.0x your moneyfrom $60K invested
20 Years$120K~1.0x your moneyfrom $120K invested
Compare Other Monthly Amounts
Same CAGR assumption. Use this to pressure-test different monthly commitments.
Monthly
3 Years~1.0x your money
5 Years~1.0x your money
10 Years~1.0x your money
20 Years~1.0x your money
$100/mo
$4K+$0 est. gain
$6K+$0 est. gain
$12K+$0 est. gain
$24K+$0 est. gain
$250/mo
$9K+$0 est. gain
$15K+$0 est. gain
$30K+$0 est. gain
$60K+$0 est. gain
$500/mo
$18K+$0 est. gain
$30K+$0 est. gain
$60K+$0 est. gain
$120K+$0 est. gain
$1,000/mo
$36K+$0 est. gain
$60K+$0 est. gain
$120K+$0 est. gain
$240K+$0 est. gain
* Projection assumes historical CAGR of -6.1% continues. Actual returns will vary.
Your DCA Results by Date
77 purchases
Date
Price
Invested
Portfolio Value
% Gain
Gain ($)
Jan 2, 2020
$50.75
$10,000
$10,000
+0.00%
$0
Feb 3, 2020
$54.18
$10,500
$11,176
+6.44%
$676
Mar 2, 2020
$52.31
$11,000
$11,290
+2.64%
$290
Apr 2, 2020
$39.78
$11,500
$9,086
-20.99%
$-2,414
May 4, 2020
$45.85
$12,000
$10,972
-8.57%
$-1,028
Jun 2, 2020
$47.19
$12,500
$11,793
-5.66%
$-707
Jul 2, 2020
$46.73
$13,000
$12,178
-6.32%
$-822
Aug 3, 2020
$53.10
$13,500
$14,338
+6.21%
$838
Sep 2, 2020
$64.90
$14,000
$18,024
+28.74%
$4,024
Oct 2, 2020
$66.13
$14,500
$18,866
+30.11%
$4,366
Nov 2, 2020
$59.64
$15,000
$17,514
+16.76%
$2,514
Dec 2, 2020
$64.14
$15,500
$19,336
+24.75%
$3,836
Jan 4, 2021
$75.57
$16,000
$23,281
+45.51%
$7,281
Feb 2, 2021
$92.64
$16,500
$29,040
+76.00%
$12,540
Mar 2, 2021
$84.10
$17,000
$26,863
+58.02%
$9,863
Apr 5, 2021
$90.31
$17,500
$29,347
+67.70%
$11,847
May 3, 2021
$92.49
$18,000
$30,555
+69.75%
$12,555
Jun 2, 2021
$77.98
$18,500
$26,262
+41.95%
$7,762
Jul 2, 2021
$77.00
$19,000
$26,432
+39.11%
$7,432
Aug 2, 2021
$73.60
$19,500
$25,765
+32.13%
$6,265
Sep 2, 2021
$75.24
$20,000
$26,839
+34.19%
$6,839
Oct 4, 2021
$69.83
$20,500
$25,409
+23.95%
$4,909
Nov 2, 2021
$69.55
$21,000
$25,807
+22.89%
$4,807
Dec 2, 2021
$69.71
$21,500
$26,366
+22.63%
$4,866
Jan 3, 2022
$66.62
$22,000
$25,698
+16.81%
$3,698
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Frequently Asked Questions
Common questions about DCA investing in ROCK
Investing $500 per month in Gibraltar Industries, Inc. (ROCK) over the past 6 years would be worth approximately $32K today. That's -32.8% total return on $48K invested, with a -6.1% compound annual growth rate (CAGR).