T   -    A Nasdaq stock symbol specifying that the stock has warrants or rights.

T/P - Take Profit Order   -   An order used by currency traders specifying the exact rate or number of pips from the current price point where to close out their current position for a profit. The rate deemed to be the level where the trader wants to take a profit is sometimes referred to as the "take-profit point".

TA - Technical Analysis   -   A method of evaluating securities by analyzing statistics generated by market activity, such as past prices and volume. Technical analysts do not attempt to measure a security's intrinsic value, but instead use charts and other tools to identify patterns that can suggest future activity.

TA - Transfer Agency / Agent   -   The Transfer agent generally assists in the shareholder servicing requirements of a collective investment undertaking, i.e. collecting the subscription proceeds and paying out the redemption proceeds.  They will also generally maintain the Register in respect of the collective investment undertaking.

TAA - Tactical Asset Allocation   -   An active management portfolio strategy that rebalances the percentage of assets held in various categories in order to take advantage of market pricing anomalies or strong market sectors.

TAAPS - Treasury Automated Auction Processing System   -   A computer network system developed by the Federal Reserve (and facilitated by its banks) to process the tenders received for treasury securities. The treasury securities are traded through an auction process in the primary market. Tenders are received by TAAPS from brokers wishing to purchase marketable securities. Each bid is processed and reviewed automatically by TAAPS to ensure it is in compliance with the Treasury's Uniform Offering Circular.

TAC - Targeted Amortization Class   -   A type of credit derivative that is similar to a planned amortization class (PAC) in that it protects investors from prepayment; however, it is structured differently than a PAC. TACs protect investors from a rise in the prepayment rate or a fall in interest rates. They do not protect from a fall in the prepayment rate like PACs.

TAF - Term Auction Facility   -   A monetary policy program used by the Federal Reserve to help increase liquidity in the U.S. credit markets. TAF allows the Federal Reserve to auction set amounts of collateral-backed short-term loans to depository institutions that are judged to be in sound financial condition by their local reserve banks. Participants bid through the reserve banks, with a minimum bid set at an overnight indexed swap rate relating to the maturity of the loans. These auctions allow financial institutions to borrow funds at a rate that is below the discount rate.

TAN - Tax Anticipation Notes   -   Short-term debt securities issued in anticipation of future tax collections.`

TARP - Troubled Asset Relief Program   -   A government program created for the establishment and management of a Treasury fund, in an attempt to curb the ongoing financial crisis of 2007-2008. The TARP gives the U.S. Treasury purchasing power of $700 billion to buy up mortgage backed securities (MBS) from institutions across the country, in an attempt to create liquidity and un-seize the money markets. The fund was created by a bill that was made law on October 3, 2008 with the passage of H.R. 1424 enacting the Emergency Economic Stabilization Act of 2008. The Treasury will be given $250 billion immediately, and the President must certify additional funds as they are needed. The additional funds will be distributed as $100 billion, and then as the final $350 billion is given, Congress has the right to not approve the additional amounts.

TBA - To Be Announced   -   A term used to describe a forward mortgage-backed securities trade. Pass-through securities issued by Freddie Mac, Fannie Mae and Ginnie Mae trade in the TBA market. The term TBA is derived from the fact that the actual mortgage-backed security that will be delivered to fulfill a TBA trade is not designated at the time the trade is made. The securities are "to be announced" 48 hours prior to the established trade settlement date.

TBE - Tenants By Entirety   -   When a property is owned by two or more tenants. If one owner dies, the survivor takes the whole estate.

TCO - Total Cost of Ownership   -   In general, the purchase price of an asset plus the additional costs of operation.

TCPA - Telecommunications Consumer Protection Act of 1991   -   A U.S. federal law created in response to increased consumer concern and complaints directed at the Federal Communications Commission (FCC) regarding the use of telephones for solicitation of business.

TDS - Total Debt Service Ratio   -   A debt service measure that financial lenders use as a rule of thumb to give a preliminary assessment of whether a potential borrower is already in too much debt. More specifically, this ratio shows the proportion of gross income that is already spent on housing-related and other similar payments.  
Receiving a ratio of less than 40% means that the potential borrower has an acceptable level of debt.

TEFRA - Tax Equity And Fiscal Responsibility Act Of 1982   -   Federal tax legislation passed in 1982 that modified some aspects of the Economic Recovery Tax Act of 1981 (ERTA). Both of these pieces of tax legislation took place during the Reagan Presidency.

Tequila Effect   -   Informal name given to the impact of the 1994 Mexican economic crisis on the South American economy. The Tequila Effect occurred because of a sudden devaluation in the Mexican peso, which then caused other currencies in the region (the Southern Cone and Brazil) to decline. The falling peso was propped up by US$50 billion loan granted by then U.S. president Bill Clinton.
Also referred to as the "Mexican Shock".

Tax Haven   -   A country that offers individuals and businesses little or no tax liability.

Ticker Tape   -   A computerized device that relays financial information to investors around the world, including the stock symbol, the latest price and the volume on securities as they are traded.

Toxic Waste   -   A slang term referring to securities that are unattractive due to certain underlying provisions or risks making them generally illiquid with poor pricing schemes and transparency.

Trading   -   The buying and selling of shares.

Trust Fund   -   Trust funds are set up by individuals who "trust" their fund managers to invest money on their behalf. The trust fund is legally owned by its managers. (Known as a mutual fund in the US)