A Definition

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A is the fifth letter of a Nasdaq stock symbol that specifies Class A shares.

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CONVEXITY is the price change that occurs for a bond not accounted for or predicted by modified dU1"ation. Convexity explains why price change estimates using modified duration increase in error as the yield changes, generally by more than 100 basis points. Bonds with positive (negative) convexity have increased (decreased) duration as interest rates fall (rise). Bonds with positive convexity, such as those with put options, have returns higher than those predicted by duration alone. Mortgage-backed securities and callable bonds gener­ally have negative convexity, which means that the price increase predicted by duration for a steep rate decline is too high.

GLOBAL DEPOSITORY RECEIPTS are receipts evidencing ownership in the underlying shares of a foreign company. Generally, U.S. banks and trusts issue American depository receipts (ADR) and American depository shares (ADS). They hold the foreign company securities underlying the receipts in their vaults. In addition to the underlying securities, the receipts entitle the shareholder to all dividends and capital gains. The bank or trust company issuing the receipts may have denominated the receipts in a currency other than the currency underlying the foreign security. U.S. and European banks and trust companies usually issue global depository receipts (GDR), which are receipts in the shares of global offering of a foreign issuer who has issued two securities simultaneously in two markets, usually publicly in non-U.S. markets and privately in the U.S. market. European banks and trust companies generally issue European depository receipts (EDR), sometimes called continental depository receipts (CDR) when issued in bearer form, which evidence ownership in foreign securities.

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