PIMCO Income A Fund as of 09/30/2017 Top ten holdings % of net assets 1. IRS USD 2.25000 12/20/17-5Y CME_Pay 12.01 2. CIRS USD 5.25Y MAT 2.28% 7/2017 MYC_Receive 8.97 3. IRS JPY 0.45000 03/20/19-10Y LCH_Pay 8.54 4. IRS USD 2.25000 12/20/17-5Y LCH_Pay 6.45 5. CIRS USD 5.33Y MAT 2.30% 8/2017 MYC_Receive 5.61 6. CIRS USD 5.33Y MAT 2.30% 8/2017 MYC_Receive 5.61 7. CIRS USD 5.25Y MAT 2.10% 9/2017 MYC_Receive 5.60 8. CIRS USD 5.25Y MAT 2.08% 9/2017 MYC_Receive 5.60 9. CIRS USD 5.25Y MAT 2.07% 9/2017 MYC_Receive 5.59 10. IRS USD 2.50000 12/20/17-10Y LCH_Pay 4.40
Gravity feels strongest where spacetime is most curved, and it vanishes where spacetime is flat. This is the core of Einstein's theory of general relativity, which is often summed up in words as follows: matter tells spacetime how to curve, and curved spacetime tells matter how to move.
Einstein's theory was motivated by the assumption that every point in the universe can be treated as a 'center', and that correspondingly, physics must act the same in all reference frames. His simple and elegant theory shows that time is relative to an inertial frame.