Question: What year was the person who invests in publicly traded North American corporate debt offerings and equities?

Context paragraphs:
PRA Group: PRA Group, Inc. or PRA, is a publicly traded debt buyer based in Norfolk, Virginia.  PRA was listed in the Federal Trade Commission's " Report on the Debt Buying Industry (dated January, 2013) as one of the largest debt buyers in the US.  PRA was among the top five debt buyers in the FTC Report.  PRA files with the Securities and Exchange Commission (SEC), and in PRA's 2015 Annual Report to the SEC, PRA stated that it had total revenues of $942 million for 2015, and $880 million for 2014.  In the SEC filings, PRA's revenues for 2013 were $735 million.

David Einhorn (hedge fund manager): David M. Einhorn (born November 20, 1968) is an American investor, hedge fund manager, and philanthropist.  He is the founder and president of Greenlight Capital, a "long-short value-oriented hedge fund."

Oaktree Capital Management: Oaktree Capital Management is an American global asset management firm specializing in alternative investment strategies.  It is the largest distressed investor in the world, and one of the largest credit investors in the world.  Oaktree emphasizes an opportunistic, value-oriented, and risk-controlled approach to investments in distressed debt, corporate debt (including high yield debt and senior loans), control investing (including private equity and special situations), convertible securities, real estate and listed equities.

Hannover House: Hannover House is an American entertainment media distributor, specializing in the manufacture and release of pre-recorded movies and programs onto DVD and Blu-ray video devices, and the publication of literary and non-fiction books.  Hannover is also active in the release of higher-profile films to theaters and to the domestic (North American) television markets.  Principal offices, warehousing and production facilities for Hannover House are located in Springdale, Arkansas, near the world headquarters for Wal-Mart Stores, Inc.  The company also maintains an office in Los Angeles, California, and runs its publicity and promotional activities out of New York, New York.  Hannover House is a publicly traded company on the OTC Markets, symbol HHSE.  The company has posted five years of consecutive profitabiity since becoming a publicly traded company in January 2010, and is on track for a significant growth during 2016.

Corporate bond: A corporate bond is a bond issued by a corporation in order to raise financing for a variety of reasons such as to ongoing operations, M&A, or to expand business.  The term is usually applied to longer-term debt instruments, with maturity of at least one year.  Corporate debt instruments with maturity shorter than one year are referred to as commercial paper.

Private equity: Private equity typically refers to investment funds organized as limited partnerships that are not publicly traded and whose investors are typically large institutional investors, university endowments, or wealthy individuals.  Private equity firms are known for their extensive use of debt financing to purchase companies, which they restructure and attempt to resell for a higher value.  Debt financing reduces corporate tax burdens and is one of the principal ways in which private equity firms make business more profitable for investors.  Private equity might also create value by overcoming agency costs and better aligning the incentives of corporate managers with those of their shareholders.

Greenlight Capital: Greenlight Capital is a hedge fund founded in 1996 by David Einhorn.  Greenlight invests primarily in publicly traded North American corporate debt offerings and equities.  Greenlight is most notable for its short selling of Lehman stock prior to Lehman Brothers' collapse in 2008 and the $11 million fine they received in January 2012 for insider trading in the UK.  Einhorn remains the fund's manager.

WisdomTree Investments: WisdomTree Investments, Inc. (NASDAQ: WETF) is a New York-based exchange-traded fund (“ETF”) and exchange-traded product ("ETP") sponsor and asset manager.  WisdomTree launched its first ETFs in June 2006, and is currently the industry’s fifth largest ETF provider in the United States.  WisdomTree sponsors 92 distinct ETFs that span asset classes and countries around the world.  Categories include: U.S. and International Equity, Currency, Fixed Income and Alternatives.  WisdomTree's largest ETF in terms of AUM is the WisdomTree Europe Hedged Equity Fund , which had over $20.39 billion on December 28, 2015.  The ETFs invests in European equities but hedges out currency risks due to the changing exchange rates between the US Dollar and the euro.  WisdomTree was one of the pioneers for the concept of fundamentally weighted ETFs and active ETFs and is currently an industry leader in both categories.  WisdomTree is the only publicly traded asset manager exclusively focused on the ETP industry.  WisdomTree manages approximately $44.5 billion in ETF assets under management, as of February 23, 2016.

New Mountain Capital: New Mountain Capital is an alternative investment manager with private equity, public equity and private debt strategies.  New Mountain Capital's public equity arm, Vantage, takes non-control positions in publicly traded companies.  An affiliate of New Mountain is the investment advisor for New Mountain Finance Corporation, a publicly traded business development company ().

Encore Capital Group: Encore Capital Group, Inc. and its subsidiaries form the largest publicly traded debt buyer by revenue in the United States.  It has established operations in 11 countries.  Its subsidiaries purchase portfolios of consumer receivables from major banks, credit unions, commercial retailers, and telecommunications companies, and work with individuals to repay their debts.  At the corporate level, debt collection is high profitable and Encore Capital enjoyed revenue growth from $545 million in 2012 to $1.029 billion in 2016.  The firm is a publicly traded NASDAQ Global Select company (ticker symbol ECPG), a component stock of the Russell 2000, the S&P SmallCap 600, and the Wilshire 4500.

Supporting paragraphs: Greenlight Capital David Einhorn (hedge fund manager)
Answer: 1968