NEW YORK ( TheStreet) -- Given its size and dominance within the consumer realm, investors holding on to products like the Market Vectors Retail ETF ( RTH), the Vanguard Consumer Staples ETF ( VDC), and the iShares Dow Jones U.S. Consumer Services Index Fund ( IYC) should keep their eyes on the ongoing bribery-related drama facing discount retail giant, Wal-Mart ( WMT). RTH is particularly vulnerable to the company's fluctuations; shares of WMT represent nearly 12% of the fund's portfolio.
The iShares MSCI Israel Capped Investable Market Index Fund ( EIS) is another prime example of an unsettlingly concentrated exchange traded product. Like EWW, EIS is designed to appeal to those looking to cast a wide net over the universe of Israel-based companies. 10 Stocks That Could Rise in Market Decline >> Those venturing into the product gain instant access to 79 individual names including Israel Chemicals, Bank Hapoalim and Bezeq, the Israeli communications company. The bulk of EIS' day-to-day performance will ultimately be determined, however, by how things fare for Teva Pharmaceuticals ( TEVA). The index underlying the fund sets aside nearly a quarter of its assets for this generic drug giant. During periods of market optimism, funds like EWW and EIS may be enticing for those looking to take aim at unique corners of the globe. However, even during these bullish periods, investors should view these funds as small niche positions. 8 Fertilizer Stocks Primed for Growth >> Excessive exposure to top-heavy products can create unnecessary headaches and interfere with the construction of a long-term portfolio.