💸 通货膨胀与购买力
1968 年一个巨无霸约 $0.49,如今约 $5.79。钱为什么会贬值,又该如何守护它?
我们通过真实案例与经济理论来探讨。
💡 什么是通货膨胀?
一种物价持续上涨、货币购买力下降的经济现象。如果 1990 年一张电影票约 $2.89,如今约 $10.78,同样的钱能买到的更少了。若 3% 的年通胀持续 24 年,物价大约翻倍(以复利计)。
央行印钞越多,货币越不稀缺,其价值就越下降。
当经济繁荣或消费激增时,供给跟不上需求,物价随之上涨。
当石油、原材料或工资上涨时,企业会将负担转嫁到消费者物价上。
💰 为什么需要投资?
如果存款利率为 2% 而通胀为 3%,把钱存在银行实际上每年亏损 1%。你需要跑赢通胀的收益率,资产才能真正增长。以美国 CPI(BLS)计,物价从 1990 年到 2026 年上涨约 2.4 倍。
Gasoline increase
11x
1960: $0.31/gal → 2024: $3.30
Movie ticket increase
17x
1960: $0.69 → 2024: $11.51
Median new home increase
23x
1963: $18,000 → 2024: $420,300
US dollar purchasing power
-96.5%
1913 $1 = 2024 $0.035
数据来源
Each item's price is from U.S. official series — BLS CPI (Average Price series), EIA, USPS, U.S. Census Bureau & HUD, U.S. Dept. of Labor, and NCES/College Board. Per-item sources are shown at the bottom of each card. Some early-year values (before the modern series begins) are estimates, flagged in each note.
价格变化指数(1980 = 100)
即使单位不同也能在同一基准上比较。线条越陡,上涨越快。
Big Mac (McDonald's)
1 sandwich
12倍
1968→2025
Source: The Economist Big Mac Index (via Statista) + McDonald's menu-price history (History.com). Early-year figures are approximate; prices vary by US location.
Gasoline (regular)
1 gallon
11倍
1960→2024
Source: U.S. Energy Information Administration (EIA) annual average retail price, regular grade; cross-checked vs BLS CPI gasoline series. Includes taxes.
Whole milk
1 gallon
4倍
1960→2024
Source: BLS Average Price series (Milk, Fresh, Whole, per gallon; FRED APU0000709112) via U.S. Inflation Calculator. Pre-1995 values reconstructed from the BLS half-gallon series (estimate).
Eggs (Grade A, large)
1 dozen
6倍
1960→2024
Source: BLS Average Price series (Eggs, Grade A, Large, per dozen; FRED APU0000708111) via U.S. Inflation Calculator. 1960 value is an estimate (predates modern series).
White bread
1 loaf (~1 lb)
10倍
1960→2024
Source: BLS Average Price series (Bread, White, Pan, per lb; FRED APU0000702111; starts 1980) via TradingEconomics, Stacker. 1960 value is an estimate.
Ground coffee
1 lb (ground roast)
2倍
1980→2024
Source: BLS Average Price series (Coffee, 100%, Ground Roast, per lb; FRED APU0000717311; starts 1980) via U.S. Inflation Calculator. Per pound of ground coffee, not a cafe cup.
Movie ticket
1 admission
17倍
1960→2024
Source: NATO (National Association of Theatre Owners / Cinema United) annual average admission, cross-referenced with Box Office Mojo. 2020 uses the 2019 value (COVID makes 2020 unreliable).
First-class stamp (1 oz)
1 stamp
17倍
1960→2024
Source: USPS first-class rate (first ounce) in effect each year, cross-checked vs Wikipedia 'History of United States postage rates'.
Median new home price
median new home sold
23倍
1963→2024
Source: U.S. Census Bureau & HUD, median sales price of new homes sold (series MSPNHSUSA). Series starts 1963; 1963 value used as the earliest point.
Average new car price
avg new vehicle
19倍
1960→2024
Source: J.D. Power/NADA historical averages (1960–2000) and Kelley Blue Book / Cox Automotive average transaction price (2010+). Measure shifts ~2010, so pre-2010 values are approximate.
Federal minimum wage
per hour
7倍
1960→2024
Source: U.S. Department of Labor 'History of Federal Minimum Wage Rates', cross-checked vs FRED. Rate in effect during each year; unchanged at $7.25 since July 2009.
Public 4-yr tuition (in-state)
in-state, 1 year
26倍
1970→2024
Source: NCES Digest of Education Statistics + College Board 'Trends in College Pricing'. Published in-state tuition and required fees (excludes room & board), academic year beginning that year.
Coca-Cola (single serving)
1 bottle/can
20倍
1960→2024
Source: decade-by-decade retail-price journalism (24/7 Wall St., GeekSpin). No official series and container size varies by era, so all values are indicative estimates.
📋 结果基于历史数据计算,过去的收益不代表未来的收益。
📋 本服务旨在帮助理解投资、供教育之用,并非投资建议。