SPDR
SPDR is State Street Global Advisors' family of exchange-traded funds, best known for the SPDR S&P 500 Trust.
Last updated August 21, 2026
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Overview
SPDR is a global exchange-traded-fund brand managed by State Street Global Advisors (SSGA), the asset-management arm of State Street Corporation. The name is derived from Standard & Poor's Depositary Receipts, the original name of the fund now known as the SPDR S&P 500 Trust ETF. The brand is commonly pronounced “spider,” and its products are sometimes informally called Spiders. The SPDR trademark is owned by Standard & Poor's Financial Services LLC, a subsidiary of S&P Global, reflecting the historical relationship between the fund family and the S&P index business. The brand's foundation was the creation of a tradable vehicle designed to follow the S&P 500 Index. Rather than requiring investors to buy the index's constituent securities individually, the product provided exchange-based access to a broad portfolio intended to track the performance of large-capitalization U.S. equities. This structure helped establish the ETF as an important investment format for institutional investors, financial advisers, and individual investors. The original fund is widely identified by the ticker SPY and is structured as a unit investment trust. SPDR subsequently expanded beyond its original large-cap U.S. equity exposure. In 1995, a Mid-Cap SPDR was introduced to track the S&P MidCap 400. In 1998, SSGA and Merrill Lynch introduced the Sector Spiders, creating a way to obtain targeted exposure to sectors represented in the S&P 500. The sector range later developed into funds covering the major Global Industry Classification Standard sectors, including technology, health care, financials, energy, industrials, materials, utilities, consumer discretionary, and consumer staples. Because of the composition of the S&P 500, telecommunications exposure has historically been handled within the relevant sector structure rather than always appearing as a wholly separate fund. SSGA also developed other index-based products under names including StreetTRACKS and DOW DIAMONDS. In 2007, the manager consolidated its U.S. ETF lineup under the SPDR identity, bringing 23 funds into a common brand architecture. This rebranding made SPDR a broader platform rather than a name associated only with the S&P 500 product. The range came to include equity, fixed-income, international, emerging-market, real-estate, commodity, and specialized industry exposures. Among the best-known products is SPDR Gold Shares, which gives investors exchange-traded exposure to gold and became one of the world's largest commodity-based ETFs. Other offerings have tracked benchmarks such as the Dow Jones Industrial Average, S&P 400, S&P sector indexes, international equity indexes, government and corporate bond indexes, real-estate securities, emerging markets, and commodity-related industries. SSGA has also managed SPDR-branded products listed outside the United States, including funds in Australia, Singapore, and Hong Kong. SPDR operates in a highly competitive ETF market alongside providers such as iShares and Vanguard. The brand is associated with index tracking, exchange liquidity, transparent benchmark exposure, and a broad menu of investment building blocks. Its flagship S&P 500 fund has become one of the most prominent ETFs globally, while the overall SPDR family is described in the referenced Wikipedia material as the third-largest ETF provider by assets. The brand remains active and is used across SSGA's international ETF business.
History
SPDR's history is closely connected with the development of the modern exchange-traded fund. The initial product was created to provide exchange-traded exposure to the S&P 500, allowing investors to buy and sell a single security representing a portfolio designed to follow a major equity index. The product was named Standard & Poor's Depositary Receipts, giving rise to the SPDR abbreviation and the informal “Spider” pronunciation. It is now known as the SPDR S&P 500 Trust ETF. The original fund was developed through cooperation involving State Street Global Advisors and the American Stock Exchange, with the S&P index business supplying the benchmark relationship. Its unit-investment-trust structure distinguished it from many later ETFs organized as open-end investment companies. The fund's exchange listing and index-based design helped demonstrate how a diversified portfolio could be traded intraday in the same general manner as an individual stock. The family expanded in 1995 with Mid-Cap SPDRs, which followed the S&P MidCap 400. This gave investors an index vehicle for middle-market U.S. companies and extended the brand beyond the largest U.S. corporations. In 1998, SSGA and Merrill Lynch introduced the Sector Spiders. These funds provided more focused exposure to sectors of the S&P 500 and established a product architecture that later became one of the most recognizable parts of the SPDR range. SSGA also developed other ETF products under separate names. DOW DIAMONDS was designed to track the Dow Jones Industrial Average, while the StreetTRACKS family covered additional index-based strategies. These products expanded the manager's ETF capabilities but initially did not all share a single consumer-facing identity. A major branding change occurred in 2007, when SSGA renamed its other U.S. ETFs as SPDRs. The change brought the StreetTRACKS products and other flagship funds into one family, reportedly uniting 23 U.S. ETFs under the SPDR name. This transformed SPDR from the identity of one prominent S&P 500 fund into a comprehensive ETF brand spanning equities, bonds, sectors, international markets, real estate, and commodities. The product family subsequently developed an international footprint. SSGA manages SPDR-branded ETFs traded in markets outside the United States, including Australia, Singapore, and Hong Kong. Australian examples include funds tracking the S&P/ASX 50, S&P/ASX 200, and S&P/ASX 200 A-REIT indexes. Asian listings have included products linked to the Dow Jones Industrial Average, the S&P 500, gold, the FTSE Greater China Index, and regional benchmarks. SPDR also became an important provider of non-equity exposure. SPDR Gold Shares extended the ETF format into commodities and became one of the most prominent commodity-based ETFs. The broader range includes Treasury, aggregate bond, corporate credit, municipal bond, mortgage-backed, inflation-protected, high-yield, international government, and convertible-securities strategies. Equity products cover U.S. capitalization segments, sectors, industries, international developed markets, emerging markets, small-cap companies, dividends, biotechnology, pharmaceuticals, semiconductors, energy, metals and mining, and real estate. The brand is managed by State Street Global Advisors but uses the SPDR trademark owned by Standard & Poor's Financial Services, an S&P Global subsidiary. Its history therefore reflects both the growth of passive investing and the commercialization of index brands. Today, SPDR remains an active global ETF family and competes with other large providers through a combination of flagship scale, benchmark breadth, trading liquidity, and international distribution.
- 2007
U.S. ETF family consolidated under SPDR
[1]SSGA rebranded its other U.S. ETFs, including StreetTRACKS products and DOW DIAMONDS, under the SPDR identity. The move unified 23 funds under one brand.
- 1998
Sector Spiders introduced
[1]SSGA and Merrill Lynch introduced sector-focused SPDR products, giving investors targeted exposure to sectors represented in the S&P 500.
- 1995
Mid-Cap SPDRs introduced
[1]A Mid-Cap SPDR was launched to track the S&P MidCap 400, extending the family into U.S. middle-capitalization equities.
- 1993
Launch of the original SPDR fund
[1]The original Standard & Poor's Depositary Receipts fund was introduced to track the S&P 500. It later became known as the SPDR S&P 500 Trust ETF and established the SPDR brand.
Products and positioning
A broad, index-oriented ETF platform emphasizing liquid, exchange-traded access to equity, bond, commodity, real-estate, sector, and international benchmarks.
U.S. large-cap equity ETF · 1993
SPDR S&P 500 Trust ETF
The original SPDR product and the best-known fund in the family. It is designed to track the S&P 500, providing exchange-traded exposure to a broad portfolio of major U.S. companies. The fund is commonly associated with the ticker SPY and is structured as a unit investment trust.
U.S. mid-cap equity ETF · 1995
SPDR S&P MidCap 400 ETF
A fund designed to follow the S&P MidCap 400, giving investors exposure to a segment of U.S. companies below the large-cap universe represented by the S&P 500.
sector equity ETFs · 1998
SPDR Select Sector ETFs
A group of sector funds designed to isolate major sectors of the S&P 500. The range includes areas such as technology, health care, financials, energy, industrials, materials, utilities, consumer discretionary, and consumer staples.
commodity ETF
SPDR Gold Shares
A commodity-focused ETF intended to provide exchange-traded exposure to gold. It broadened SPDR beyond equity and bond indexes and became one of the most prominent commodity-based ETFs.
U.S. blue-chip equity ETF
DOW DIAMONDS
A product developed by SSGA in cooperation with the American Stock Exchange and designed to track the Dow Jones Industrial Average. It was later incorporated into the broader SPDR branding structure.
bond ETFs
SPDR fixed-income ETFs
The fixed-income range includes strategies linked to Treasury securities, aggregate bonds, corporate credit, municipal bonds, mortgage-backed securities, high-yield debt, inflation-protected securities, international government bonds, and convertible securities.
international equity ETFs
International and regional SPDR ETFs
SPDR products listed outside the United States provide exposure to international, emerging-market, regional, and country-specific benchmarks. Examples include Australian equity indexes, Greater China, emerging Asia-Pacific, international small-cap, and global ex-U.S. strategies.
Brand decisions
2007
Unification of the U.S. ETF portfolio under SPDRStrategyBackground
SSGA had marketed some index funds under names such as StreetTRACKS and DOW DIAMONDS, while the SPDR name was strongly associated with the original S&P 500 product.
Action taken
SSGA rebranded its other U.S. ETFs as SPDRs, bringing 23 funds into a single brand family.
Aftermath
The change made SPDR a platform brand covering a wider range of equity, bond, commodity, sector, and international strategies.
Recent events
State Street releases SPDR S&P 500 ESG ETF[3]
Reported:
State Street released the SPDR S&P 500 ESG ETF, which includes S&P 500 firms meeting environmental, social and governance criteria.
Sources4 sources
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