NEW DELHI: Investments in domestic capital markets through participatory notes (P-Notes) plunged to its lowest level in nearly three years to Rs 1.79 lakh crore in end-November.P-Notes are typical instruments issued by registered foreign portfolio investors (FPIs) to overseas investors who wish to participate in Indian markets without registering themselves directly in the country to save time. But they still need to go through a proper due diligence process.According to the data available with Sebi , the total value of P-Notes investment in Indian markets -- equity, debt and derivatives -- fell to Rs 1,79,648 crore in November-end, from Rs 1,99,987 crore at the end of October.This was the lowest level since February 2014 when the cumulative value of such investments stood at Rs 1,72,738 crore.The investment through the route was Rs 2,12,509 crore, Rs 2,16,232 crore and Rs 2,12,179 crore at the end of September, August and July, respectively.In June, P-Notes investments plunged to Rs 2.10 lakh crore, which was the lowest in nearly two years, owing to a tight vigil on funds coming through the route.The total value of P-Notes investment in Indian markets has fallen since October 2015 and the trend continued till February this year. However, it saw a slight increase in March but dipped again in April.A slight uptick in investment through P-Notes was witnessed in May, however, it again plunged in June. Further, marginal increase was seen in July and August, while it again slipped in September and October.Of the total, P-Note holdings in equities were at Rs 1.25 lakh crore in October-end and the remaining holdings were in debt and derivatives markets.The quantum of FPI investments via P-Notes decreased to 7.5 per cent in November, from 7.8 per cent in the preceding month.The share of P-Notes has been falling over the years as Sebi tightened disclosure norms and other related regulations . It used to be much higher at 25-40 per cent in 2008, while the reading was as high as 55 per cent at the peak of the stock market bull run in 2007.In absolute terms, value of P-Notes investment rose to a record Rs 4.5 lakh crore in October 2007, but dropped to Rs 3.22 lakh crore in February 2008 and Rs 60,948 crore in February 2009.