Wondering why there was a strange move or a huge blip in trading volume in a stock you own? There's a good chance that it was caused by a trading glitch from Wall Street firm Knight Capital Group (NYSE: KCG). With a hat tip to Business Insider, here's a list of the stocks that NYSE Euronext (NYSE: NYX) was looking into because of strange trading activity.

Alcoa (NYSE: AA)

Almaden Minerals (NYSE: AAU)

Arch Coal (NYSE: ACI)

Aflac (NYSE: AFL)

Allergan (NYSE: AGN)

AIG (NYSE: AIG)

Alcatel Lucent (NYSE: ALU)

AMD (NYSE: AMD)

American Tower (NYSE: AMT)

TD AMERITRADE (NYSE: AMTD)

Abercrombie & Fitch (NYSE: ANF)

Alpha Natural Resources (NYSE: ANR)

American Reprographics (NYSE: ARC)

ARMOUR Residential (NYSE: ARR)

Yamana Gold (NYSE: AUY)

American Express (NYSE: AXP)

Bank of America (NYSE: BAC)

Best Buy (NYSE: BBY)

Bunge (NYSE: BG)

Buckeye Partners (NYSE: BPL)

Berkshire Hathaway (NYSE: BRK-B)

Annheuser-Busch (NYSE: BUD)

Boyd Gaming (NYSE: BYD)

Citigroup (NYSE: C)

Caterpillar (NYSE: CAT)

Cornerstone Progressive Return (NYSE: CFP)

Chesapeake Energy (NYSE: CHK)

Credit Suisse Asset Management Income Fund (NYSE: CIK)

CoreLogic (NYSE: CLGX)

China Cord Blood (NYSE: CO)

Spansion (NYSE: CODE)

Coach (NYSE: COH)

Cash America (NYSE: CSH)

CVS (NYSE: CVS)

Dupont (NYSE: DD)

3D Systems (NYSE: DDD)

Deere (NYSE: DE)

Dollar General (NYSE: DG)

Dice Holdings (NYSE: DHX)

Dolby (NYSE: DLB)

Dole Food (NYSE: DOLE)

Dow Chemical (NYSE: DOW)

Wells Fargo Advantage Income Opportunities Fund (NYSE: EAD)

E-House Holdings (NYSE: EJ)

Energy Transfer Partners (NYSE: ETP)

Exelon (NYSE: EXC)

Eaton Vance Tax-Managed Global (NYSE: EXG)

Ford (NYSE: F)

Ferro (NYSE: FOE)

Forest Laboratories (NYSE: FRX)

Freescale Semiconductor (NYSE: FSL)

Great Basin Gold (NYSE: GBG)

Greenbrier Companies (NYSE: GBX)

General Electric (NYSE: GE)

Goldcorp (NYSE: GG)

General Mills (NYSE: GIS)

Corning (NYSE: GLW)

General Motors (NYSE: GM)

GameStop (NYSE: GME)

Genworth Financial (NYSE: GNW)

Government Properties Income Trust (NYSE: GOV)

Goodyear Tire & Rubber (NYSE: GT)

HollyFrontier (NYSE: HFC)

Herbalife (NYSE: HLF)

Honda Motor (NYSE: HMC)

Harley-Davidson (NYSE: HOG)

Humana (NYSE: HUM)

Juniper Networks (NYSE: JNPR)

Wells Fargo Capital IX Trust (NYSE: JWF)

Nordstrom (NYSE: JWN)

Kinross Gold (NYSE: KGC)

Kohlberg Kravis Roberts (NYSE: KKR)

Kronos Worldwide (NYSE: KRO)

Quicksilver Resources (NYSE: KWK)

Lithia Motors (NYSE: LAD)

Lennar (NYSE: LEN)

Cheniere Energy (NYSE: LNG)

Comstock Mining (NYSE: LODE)

Lowe's (NYSE: LOW)

LSI (NYSE: LSI)

Southwest (NYSE: LUV)

Level 3 Communications (NYSE: LVLT)

LyondellBasell (NYSE: LYB)

Lloyds Banking (NYSE: LYG)

Molycorp (NYSE: MCP)

Magnum Hunger Resources (NYSE: MHR)

Marathon Petroleum (NYSE: MPC)

Mechel (NYSE: MTL)

Manitowoc (NYSE: MTW)

MasTec (NYSE: MTZ)

NetSuite (NYSE: N)

Nordic American Tanker (NYSE: NAT)

Navidea Biopharmaceuticals (NYSE: NAVB)

Newmont Mining (NYSE: NEM)

NovaGold Resources (NYSE: NG)

Annaly Capital Management (NYSE: NLY)

Nokia (NYSE: NOK)

Nu Skin (NYSE: NUS)

Novartis (NYSE: NVS)

New York Community Bancorp (NYSE: NYB)

Realty Income (NYSE: O)

Pandora (NYSE: P)

PepsiCo (NYSE: PEP)

Pfizer (NYSE: PFE)

Pengrowth Energy (NYSE: PGH)

Pioneer High Income (NYSE: PHT)

Pier 1 Imports (NYSE: PIR)

Protective Life (NYSE: PL)

Rite Aid (NYSE: RAD)

Royal Bank of Scotland (NYSE: RBS)

Rare Elements Resources (NYSE: REE)

RadioShack (NYSE: RSH)

Banco Santander (NYSE: SAN)

SandRidge Energy (NYSE: SD)

Silver Wheaton (NYSE: SLW)

Sony (NYSE: SNE)

Southwestern Energy (NYSE: SWN)

AT&T (NYSE: T)

Box Ships (NYSE: TEU)

Titanium Metals (NYSE: TIE)

Timken (NYSE: TKR)

Triangle Petroleum (NYSE: TPLM)

Trinity Industries (NYSE: TRN)

Taiwan Semiconductor (NYSE: TSM)

LIN TV (NYSE: TVL)

Two Harbors Investment (NYSE: TWO)

United Continental Holdings (NYSE: UAL)

Unilever (NYSE: UL)

Unilever (NYSE: UN)

Reaves Utility Income Fund (NYSE: UTG)

Valassis Communications (NYSE: VCI)

Vonage (NYSE: VG)

Vanguard Natural Resources (NYSE: VNR)

Verizon (NYSE: VZ)

Walgreen (NYSE: WAG)

Wells Fargo (NYSE: WFC)

WellPoint (NYSE: WLP)

Watson Pharmaceuticals (NYSE: WPI)

Wizzard Software (NYSE: WZE)

Yingli Green Energy (NYSE: YGE)